Python - Loops

Loops are used to repeat statement upto n number of times. In Python, we have 2 types of loops: while loop and for loop.

In While Loop gererally we have initialization, condition, and increment/decrement.

i=1
while i<10:
    print(i)
    i+=1

A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string). In For loop, generally we do not need to initialization and increment

nums = [10,20,15,12,25]
for n in nums:
    print(n)

name = 'Ankit'
for i in name:
    print(i)

for i in [10,20,30,15,25]:
    print(i)
	
for i in range(10):
    print(i)

for i in range(11,21):
    print(i)

for i in range(11,21,2):
    print(i)

for i in range(20,10,-1):
    print(i)

1. WAP to print all numbers from 1 to 100, skip the numbers which are divisible by 3 or 5.
2. WAP to find input number is prime or not.

num=7
for i in range(2,num):
    if num%i==0:
        print('Not Prime')
        break
else:
    print('Prime')

Nested loop means a loop inside another loop.

for i in range(1,6):
    for j in range(1,6):
        print("i=",i," j=",j)

i=1
while i<5:
    j=1
    while j<=5:
        print("hi", i, j)
        j=j+1
    i=i+1