Coding Quiz Zone

x = 'abcd'
for i in range(len(x)):
    x[i].upper()
print (x)

x = 'abcd'
for i in range(len(x)):
    i.upper()
print (x)

x = 'abcd'
for i in range(len(x)):
    print(i.upper())

x = 'abcd'
for i in range(len(x)):
    print(i)

x = 'abcd'
for i in range(x):
    print(i)

x = 'abcd'
for i in x:
    print(i.upper())

x = 'abcd'
for i in x:
    print(i)
    x.upper()

x = "abcdef"
i = "a"
while i in x[1:]:
    print(i, end = " ")

x = "abcdef"
i = "a"
while i in x:
    x = x[1:]
    print(i, end = " ")

x = "abcdef"
i = "a"
while i in x[:-1]:
    print(i, end = " ")