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while loop

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While loop in python works on the concept of iterating a statement till the conditional statement is True.
While loop is preferred over for loop if there is a condition to be checked before iteration occurs.
While loop also uses less memory to iterate hence the processing speed or time complexity of the while loop is lesser than that of for loop.

example -

num = 5
i = 0

while i < num:   #Condition to check before running loop
    print(i)
    i = i + 1

Output- 

0
1
2
3
4

In this example, two variables are defined num and I.
while i < num statement it is checked whether the variable i is less than num.
If the condition is satisfied then loop will keep iterating.

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