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LESSON 7: LOOPS AND NESTED LOOPS ✳️Looping in java helps by facilitating the execution of of a set of instructions repeatedly while some condition evaluates to true. 1. While-loops: allows the code to be executed repeatedly based on a given Boolean condition.

   while (boolean condition)
     {
   loop statements...
   }

2. for-loops: unlike while statement, it consumes the initialization, condition, and increment/decrement. for (initialization condition; testing condition; increment/decrement) { statement(s) } 3. do-while: do while loop is similar to while loop with only difference that it checks for condition after executing the statements. do { statements.. } while (condition); sample example for for-loop:

public class Loops
{
    public static void main(String[] args)
    {
        ArrayList<Integer> ar = new ArrayList<>();//we will see about list in the next lessons
        for (int i = 0; i < Integer.MAX_VALUE; i++)
        {
            ar.add(i);
        }
    }

} link to get our Channel» https://t.me/PROGRAMINGLANGUAGES1» group for your comments» https://t.me/learntocodecpp

LESSON 7: LOOPS AND NESTED LOOPS ✳️Looping in java helps by facilitating the execution of of a set of instructions repeatedly while some condition evaluates to true. 1. While-loops: allows the code to be executed repeatedly based on a given Boolean condition.

   while (boolean condition)
     {
   loop statements...
   }

2. for-loops: unlike while statement, it consumes the initialization, condition, and increment/decrement. for (initialization condition; testing condition; increment/decrement) { statement(s) } 3. do-while: do while loop is similar to while loop with only difference that it checks for condition after executing the statements. do { statements.. } while (condition); sample example for for-loop:

public class Loops
{
    public static void main(String[] args)
    {
        ArrayList<Integer> ar = new ArrayList<>();//we will see about list in the next lessons
        for (int i = 0; i < Integer.MAX_VALUE; i++)
        {
            ar.add(i);
        }
    }

} link to get our Channel» https://t.me/PROGRAMINGLANGUAGES1» group for your comments» https://t.me/learntocodecpp

‼️: ignore [a], [b],[c] and [d] it is only to identify the choice

LESSON 6: ARRAY AND 2D ARRAYS ✅An array is a collection of items stored at contiguous memory locations. The idea is to store multiple items of the same type together. ✳️Multidimensional Arrays can be defined in simple words as array of arrays. Data in multidimensional arrays are stored in tabular form (in row major order). *In the array there will be: data_type : type of data to be stored in the array dimension: the dimension of the array is created. like 1D, 2D ... array_name: name of the array finally , the size of the array. #example_of_array:; class CODER { public static void main (String[] args) { // declares an Array of integers. int[] arr; // allocating memory for 5 integers. arr = new int[5]; // initialize the first elements of the array arr[0] = 10; // initialize the second elements of the array arr[1] = 20; //so on... arr[2] = 30; arr[3] = 40; arr[4] = 50; // accessing the elements of the specified array for (int i = 0; i < arr.length; i++) System.out.println("Element at index " + i + " : "+ arr[i]); } } 2D array:- class Learn { public static void main(String[] args) { int[][] arr = new int[10][20]; arr[0][0] = 1; System.out.println("arr[0][0] = " + arr[0][0]); } }

LESSON 5: JAVA MATH: ⚜️The Java Math class has many methods that allows you to perform mathematical tasks on numbers. ✳️The Math.sqrt(x) method returns the square root of x. ✳️The Math.max(x,y) method can be used to find the highest value of x and y. ✳️ The Math.abs(x) method returns the absolute (positive) value of x. ❤️ Math.random() returns a random number between 0.0 (inclusive), and 1.0 (exclusive). public class Firsta { public static void main(String[] args) { double x,y,z; /*double x = 3.14; double y = 3.41; double z = Math.max(x, y); double a = Math.sqrt(5); double ab = Math.ceil(x);// maximum number double ac = Math.floor(y);// minimum number System.out.println(z);*/ System.out.println(z); System.out.println(z);

LESSON 5: JAVA MATH public class Firsta { public static void main(String[] args) { double x,y,z; /*double x = 3.14; double y = 3.41; double z = Math.max(x, y); double a = Math.sqrt(5); double ab = Math.ceil(x); double ac = Math.floor(y); System.out.println(z);*/

LESSON 4: IMPORTING SCANNER CLASS IN | JAVA 👨🏽‍💻Scanner is a class in java.util package used for obtaining the input of the primitive types like int, double, etc. and strings. ✳️To read numerical values of a certain data type XYZ, the function to use is nextXYZ(). ✅ To read strings, we use nextLine(). 🔱To read a single character, we use next().charAt(0). next() function returns the next token/word in the input as a string and charAt(0) function returns the first character in that string. import java.util.Scanner; public class Firsta { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("enter some String"); String name = scanner.nextLine(); System.out.println("enter your age"); int x = scanner.nextInt(); scanner.nextLine(); System.out.println("what is you departent? "); String dep =scanner.nextLine(); System.out.println("your name is: "+name); System.out.println("your age is:"+ x); System.out.println("your in "+dep+" departement now!"); } } » share and join this channel and » GROUP To cONTRIBUTE YOUR SKILL

LESSON 3 ASSIGNMENT ✅> Every variables is assigned data type that designates the type and quantity of value it can hold. ✳️<> as many of you guess , variable is a name given to a memory location. ⚜️During declaration of a variable, we nedd to take care of two things 1. Dataype 2. Dataname Similarly , we can initialize variables by assigning values in two ways: 1.variable initialization// 2. Assigning value by taking input from user// /look the snippet code below with different dataypes and initializations

public class Firsta {

  public static void main(String[] args) {
    long x = 2345267;
    float y =3.45f;
    boolean z = true;
    char ch = '@';
    String str ="learn to code!!";
        
    
        
    
    System.out.println("the number is: " +x);
    System.out.println(y);
      System.out.println(z);
      System.out.println(ch);
      System.out.println(str);