C Programming Language || Hands On Coding
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Hands-on C programming language challenges for beginners. Learn building logic by solving programs. Owner: @Pradeep_saii
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Channel C Programming Language || Hands On Coding (@c_programming_language_coding) in the English language segment is an active participant. Currently, the community unites 12 822 subscribers, ranking 9 562 in the Technologies & Applications category and 31 207 in the India region.
π Audience metrics and dynamics
Since its creation on Π½Π΅Π²ΡΠ΄ΠΎΠΌΠΎ, the project has demonstrated rapid growth, gathering an audience of 12 822 subscribers.
According to the latest data from 26 August, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -210 over the last 30 days and by -2 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 12.56%. Within the first 24 hours after publication, content typically collects 2.42% reactions from the total number of subscribers.
- Post reach: On average, each post receives 1 612 views. Within the first day, a publication typically gains 310 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 4.
- Thematic interests: Content is focused on key topics such as input, string, scanf("%d, array, element.
π Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
βHands-on C programming language challenges for beginners. Learn building logic by solving programs.
Owner: @Pradeep_saiiβ
Thanks to the high frequency of updates (latest data received on 27 August, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
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Posts Archive
π» Find Last Occurrence of Character
#include <stdio.h>
#include <string.h>
int main() {
char str[100];
char ch;
int i, last_occurrence = -1;
printf("Enter a string: ");
scanf("%s", str);
printf("Enter the character to find: ");
scanf(" %c", &ch);
for (i = 0; str[i] != '0'; i++) {
if (str[i] == ch) {
last_occurrence = i;
}
}
if (last_occurrence != -1) {
printf("Last occurrence of '%c' found at index: %dn", ch, last_occurrence);
} else {
printf("'%c' not found in the string.n", ch);
}
return 0;
}
Input: hello Input: l Output: Last occurrence of 'l' found at index: 3 Input: banana Input: a Output: Last occurrence of 'a' found at index: 5 Input: world Input: z Output: 'z' not found in the string. Input: programming Input: g Output: Last occurrence of 'g' found at index: 8
π» Find First Occurrence of Character
#include <stdio.h>
#include <string.h>
int main() {
char str[100];
char ch;
int i;
int index = -1;
printf("Enter a string: ");
scanf("%s", str);
printf("Enter the character to find: ");
scanf(" %c", &ch);
for (i = 0; str[i] != '0'; i++) {
if (str[i] == ch) {
index = i;
break;
}
}
if (index != -1) {
printf("First occurrence of '%c' found at index: %dn", ch, index);
} else {
printf("'%c' not found in the string.n", ch);
}
return 0;
}
Input: hello Input: l Output: First occurrence of 'l' found at index: 2 Input: world Input: z Output: 'z' not found in the string. Input: banana Input: a Output: First occurrence of 'a' found at index: 1 Input: test string Input: t Output: First occurrence of 't' found at index: 0 Input: test string Input: Output: ' ' not found in the string.
π» Remove All Whitespaces from String
#include <stdio.h>
#include <string.h>
int main() {
char str[100];
int i, j = 0;
printf("Enter a string: ");
fgets(str, sizeof(str), stdin);
str[strcspn(str, "n")] = 0;
for (i = 0; str[i] != '0'; i++) {
if (str[i] != ' ') {
str[j] = str[i];
j++;
}
}
str[j] = '0';
printf("String after removing whitespaces: %sn", str);
return 0;
}
Input: Hello World Output: String after removing whitespaces: HelloWorld Input: This is a test Output: String after removing whitespaces: Thisisatest Input: Leading and trailing spaces Output: String after removing whitespaces: Leadingandtrailingspaces Input: No spaces Output: String after removing whitespaces: Nospaces Input: Output: String after removing whitespaces:
π» Check if Two Strings are Anagrams
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char str1[100], str2[100];
int freq1[26] = {0}, freq2[26] = {0};
int i;
printf("Enter first string: ");
scanf("%s", str1);
printf("Enter second string: ");
scanf("%s", str2);
if (strlen(str1) != strlen(str2)) {
printf("Strings are not anagrams.n");
return 0;
}
for (i = 0; str1[i] != '0'; i++) {
str1[i] = tolower(str1[i]);
freq1[str1[i] - 'a']++;
}
for (i = 0; str2[i] != '0'; i++) {
str2[i] = tolower(str2[i]);
freq2[str2[i] - 'a']++;
}
for (i = 0; i < 26; i++) {
if (freq1[i] != freq2[i]) {
printf("Strings are not anagrams.n");
return 0;
}
}
printf("Strings are anagrams.n");
return 0;
}
Input: listen Input: silent Output: Strings are anagrams. Input: hello Input: world Output: Strings are not anagrams. Input: RaceCar Input: carraceR Output: Strings are anagrams. Input: abc Input: abcd Output: Strings are not anagrams.
π» Count Words in a String
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char str[100];
int count = 0;
int i;
printf("Enter a string: ");
fgets(str, sizeof(str), stdin);
// Remove trailing newline character
if (str[strlen(str) - 1] == 'n') {
str[strlen(str) - 1] = '0';
}
if (strlen(str) > 0) {
count = 1;
}
for (i = 0; str[i] != '0'; i++) {
if (str[i] == ' ' && isspace(str[i])) {
count++;
}
}
printf("Number of words: %dn", count);
return 0;
}
Input: Hello World Output: Number of words: 2 Input: This is a test string. Output: Number of words: 5 Input: Leading space Output: Number of words: 2 Input: Trailing space Output: Number of words: 2 Input: Multiple spaces Output: Number of words: 3 Input: Output: Number of words: 0 Input: One Output: Number of words: 1
π» Convert String to Lowercase
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char str[100];
int i;
printf("Enter a string: ");
scanf("%[^n]", str);
for (i = 0; str[i] != '0'; i++) {
str[i] = tolower(str[i]);
}
printf("Lowercase string: %sn", str);
return 0;
}
Input: HeLlO wOrLd! Output: Enter a string: Lowercase string: hello world! Input: MiXeD cAsE sTrInG Output: Enter a string: Lowercase string: mixed case string Input: 123 AbCd Output: Enter a string: Lowercase string: 123 abcd Input: THIS IS ALL CAPS Output: Enter a string: Lowercase string: this is all caps Input: aBcDeFgHiJkLmNoPqRsTuVwXyZ Output: Enter a string: Lowercase string: abcdefghijklmnopqrstuvwxyz
π» Convert String to Uppercase
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char str[100];
int i;
printf("Enter a string: ");
scanf("%[^n]", str);
for (i = 0; str[i] != '0'; i++) {
str[i] = toupper(str[i]);
}
printf("Uppercase string: %sn", str);
return 0;
}
Input: hello world Output: Enter a string: Uppercase string: HELLO WORLD Input: MiXeD CaSe StRiNg Output: Enter a string: Uppercase string: MIXED CASE STRING Input: 123 abc Output: Enter a string: Uppercase string: 123 ABC
π» Compare Two Strings
#include <stdio.h>
#include <string.h>
int main() {
char str1[100], str2[100];
printf("Enter the first string: ");
scanf("%s", str1);
printf("Enter the second string: ");
scanf("%s", str2);
int result = strcmp(str1, str2);
if (result == 0) {
printf("The strings are equal.n");
} else if (result < 0) {
printf("The first string is less than the second string.n");
} else {
printf("The first string is greater than the second string.n");
}
return 0;
}
Input: apple Input: apple Output: The strings are equal. Input: apple Input: banana Output: The first string is less than the second string. Input: banana Input: apple Output: The first string is greater than the second string. Input: Hello Input: hello Output: The first string is less than the second string. Input: 123 Input: 1234 Output: The first string is less than the second string.
π» Concatenate Two Strings
#include <stdio.h>
#include <string.h>
int main() {
char str1[100], str2[100];
printf("Enter the first string: ");
scanf("%s", str1);
printf("Enter the second string: ");
scanf("%s", str2);
strcat(str1, str2);
printf("Concatenated string: %sn", str1);
return 0;
}
Input: Hello Input: World Output: Concatenated string: HelloWorld
π» Copy One String to Another
#include <stdio.h>
#include <string.h>
int main() {
char str1[100];
char str2[100];
int i;
printf("Enter a string: ");
scanf("%99s", str1);
for (i = 0; str1[i] != '0'; i++) {
str2[i] = str1[i];
}
str2[i] = '0';
printf("Original string: %sn", str1);
printf("Copied string: %sn", str2);
return 0;
}
Input: Hello, World! Output: Enter a string: Original string: Hello, Output: Copied string: Hello,
π» Reverse a String
#include <stdio.h>
#include <string.h>
int main() {
char str[100];
int i, len;
printf("Enter a string: ");
scanf("%s", str);
len = strlen(str);
printf("Reversed string: ");
for (i = len - 1; i >= 0; i--) {
printf("%c", str[i]);
}
printf("n");
return 0;
}
Input: Hello Output: Enter a string: Reversed string: olleH Input: Cprogramming Output: Enter a string: Reversed string: gnimmargorpC Input: 12345 Output: Enter a string: Reversed string: 54321 Input: A Output: Enter a string: Reversed string: A Input: Output: Enter a string: Reversed string:
π» Check if String is Palindrome
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char str[100];
int i, len, isPalindrome = 1;
printf("Enter a string: ");
scanf("%s", str);
len = strlen(str);
for (i = 0; i < len / 2; i++) {
if (tolower(str[i]) != tolower(str[len - i - 1])) {
isPalindrome = 0;
break;
}
}
if (isPalindrome) {
printf("%s is a palindromen", str);
} else {
printf("%s is not a palindromen", str);
}
return 0;
}
Input: madam Output: madam is a palindrome Input: racecar Output: racecar is a palindrome Input: Hello Output: Hello is not a palindrome Input: A man a plan a canal Panama Output: A is not a palindrome Input: WasItACarOrACatISaw Output: WasItACarOrACatISaw is not a palindrome Input: level Output: level is a palindrome Input: rotor Output: rotor is a palindrome Input: stats Output: stats is a palindrome Input: kayak Output: kayak is a palindrome Input: refer Output: refer is a palindrome
π» Count Digits and Special Characters in String
#include <stdio.h>
#include <string.h>
int main() {
char str[100];
int digits = 0, special = 0;
int i;
printf("Enter a string: ");
scanf("%[^n]", str);
for (i = 0; str[i] != '0'; i++) {
if (str[i] >= '0' && str[i] <= '9') {
digits++;
} else if ((str[i] >= '!' && str[i] <= '/') || (str[i] >= ':' && str[i] <= '@') ||
(str[i] >= '[' && str[i] <= ''') || (str[i] >= '{' && str[i] <= '~')) {
special++;
}
}
printf("Digits: %dn", digits);
printf("Special characters: %dn", special);
return 0;
}
Input: Hello123!@#
Output: Digits: 3
Output: Special characters: 3
Input: abcDEF456$%^
Output: Digits: 3
Output: Special characters: 3
Input: 12345
Output: Digits: 5
Output: Special characters: 0
Input: Special!@#$%^&*()
Output: Digits: 0
Output: Special characters: 10
Input: mixedCase123.,;'[]{}
Output: Digits: 3
Output: Special characters: 9
Input: Just a normal string
Output: Digits: 0
Output: Special characters: 0
Input: This string has numbers and symbols: 123!@#
Output: Digits: 3
Output: Special characters: 3
Input: ""
Output: Digits: 0
Output: Special characters: 0
Input: 123~!@#
Output: Digits: 3
Output: Special characters: 3π» Count Vowels and Consonants in a String
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main() {
char str[100];
int vowels = 0, consonants = 0;
int i;
printf("Enter a string: ");
fgets(str, sizeof(str), stdin);
// Remove trailing newline character
str[strcspn(str, "n")] = 0;
for (i = 0; str[i] != '0'; i++) {
char ch = tolower(str[i]);
if (isalpha(ch)) {
if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
vowels++;
} else {
consonants++;
}
}
}
printf("Vowels: %dn", vowels);
printf("Consonants: %dn", consonants);
return 0;
}
Input: Hello World Output: Vowels: 3 Output: Consonants: 7 Input: Programming is fun Output: Vowels: 5 Output: Consonants: 11 Input: 123 abc DEF Output: Vowels: 1 Output: Consonants: 3 Input: AEIOUaeiou Output: Vowels: 10 Output: Consonants: 0 Input: QwRtY Output: Vowels: 1 Output: Consonants: 4
π» Calculate Length of String (Without strlen())
#include <stdio.h>
int main() {
char str[100];
int length = 0;
printf("Enter a string: ");
scanf("%s", str);
while (str[length] != '0') {
length++;
}
printf("Length of the string: %dn", length);
return 0;
}
Input: Hello Output: Enter a string: Length of the string: 5 Input: This is a test Output: Enter a string: Length of the string: 4 Input: C programming Output: Enter a string: Length of the string: 1
π» Search in Row-wise and Column-wise Sorted Matrix
#include <stdio.h>
#include <stdbool.h>
int main() {
int rows, cols, target;
printf("Enter the number of rows: ");
scanf("%d", &rows);
printf("Enter the number of columns: ");
scanf("%d", &cols);
int matrix[rows][cols];
printf("Enter the elements of the matrix (row-wise sorted):n");
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
scanf("%d", &matrix[i][j]);
}
}
printf("Enter the target element to search: ");
scanf("%d", &target);
int row = 0;
int col = cols - 1;
while (row < rows && col >= 0) {
if (matrix[row][col] == target) {
printf("Element found at (%d, %d)n", row, col);
return 0;
} else if (matrix[row][col] < target) {
row++;
} else {
col--;
}
}
printf("Element not foundn");
return 0;
}
Input: 3 Input: 3 Input: 1 Input: 4 Input: 7 Input: 2 Input: 5 Input: 8 Input: 3 Input: 6 Input: 9 Input: 5 Output: Enter the number of rows: Enter the number of columns: Enter the elements of the matrix (row-wise sorted): Enter the target element to search: Element found at (1, 1)
π» Wave Form Traversal of Matrix
#include <stdio.h>
int main() {
int rows, cols;
printf("Enter the number of rows: ");
scanf("%d", &rows);
printf("Enter the number of columns: ");
scanf("%d", &cols);
int matrix[rows][cols];
printf("Enter the elements of the matrix:n");
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
scanf("%d", &matrix[i][j]);
}
}
printf("Wave form traversal of the matrix:n");
for (int j = 0; j < cols; j++) {
if (j % 2 == 0) {
// Even column: Traverse top to bottom
for (int i = 0; i < rows; i++) {
printf("%d ", matrix[i][j]);
}
} else {
// Odd column: Traverse bottom to top
for (int i = rows - 1; i >= 0; i--) {
printf("%d ", matrix[i][j]);
}
}
}
printf("n");
return 0;
}
Input: 3 Input: 4 Input: 1 Input: 2 Input: 3 Input: 4 Input: 5 Input: 6 Input: 7 Input: 8 Input: 9 Input: 10 Input: 11 Input: 12 Output: Enter the number of rows: Enter the number of columns: Enter the elements of the matrix: Wave form traversal of the matrix: 1 5 9 10 6 2 3 7 11 12 8 4
π» Spiral Order Traversal of Matrix
#include <stdio.h>
int main() {
int rows, cols, i, j;
printf("Enter the number of rows: ");
scanf("%d", &rows);
printf("Enter the number of columns: ");
scanf("%d", &cols);
int matrix[rows][cols];
printf("Enter the elements of the matrix:n");
for (i = 0; i < rows; i++) {
for (j = 0; j < cols; j++) {
scanf("%d", &matrix[i][j]);
}
}
int top = 0, bottom = rows - 1, left = 0, right = cols - 1, dir = 0; // 0: right, 1: down, 2: left, 3: up
printf("Spiral order traversal: ");
while (top <= bottom && left <= right) {
if (dir == 0) {
for (i = left; i <= right; i++) {
printf("%d ", matrix[top][i]);
}
top++;
} else if (dir == 1) {
for (i = top; i <= bottom; i++) {
printf("%d ", matrix[i][right]);
}
right--;
} else if (dir == 2) {
for (i = right; i >= left; i--) {
printf("%d ", matrix[bottom][i]);
}
bottom--;
} else if (dir == 3) {
for (i = bottom; i >= top; i--) {
printf("%d ", matrix[i][left]);
}
left++;
}
dir = (dir + 1) % 4;
}
printf("n");
return 0;
}
Input: 3 Input: 3 Input: 1 Input: 2 Input: 3 Input: 4 Input: 5 Input: 6 Input: 7 Input: 8 Input: 9 Output: Enter the number of rows: Enter the number of columns: Enter the elements of the matrix: Spiral order traversal: 1 2 3 6 9 8 7 4 5
π» Rotate Matrix by 90 Degrees
#include <stdio.h>
int main() {
int n;
printf("Enter the size of the square matrix: ");
scanf("%d", &n);
int matrix[n][n];
printf("Enter the elements of the matrix:n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
scanf("%d", &matrix[i][j]);
}
}
int rotated_matrix[n][n];
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
rotated_matrix[j][n - 1 - i] = matrix[i][j];
}
}
printf("Rotated Matrix (90 degrees clockwise):n");
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
printf("%d ", rotated_matrix[i][j]);
}
printf("n");
}
return 0;
}
Input: 3 Input: 1 Input: 2 Input: 3 Input: 4 Input: 5 Input: 6 Input: 7 Input: 8 Input: 9 Output: Enter the size of the square matrix: Enter the elements of the matrix: Rotated Matrix (90 degrees clockwise): 7 4 1 8 5 2 9 6 3
