loops in python

Python programming language provides the following types of loops to handle looping requirements. Python provides three ways for executing the loops. While all the ways provide similar basic functionality, they differ in their syntax and condition checking time.

for variable in sequence:
    # code block to be executed

Here, variable is a variable that takes on the value of each element in the sequence, one at a time. The code block below the for statement is executed for each element in the sequence.

For example, let's say we have a list of numbers and we want to print each number in the list: 

 

numbers = [1, 2, 3, 4, 5]
for num in numbers:
    print(num)

This will output: 

 

1
2
3
4
5

While Loop

The while loop is used to repeatedly execute a block of code as long as a certain condition is true. Here's the basic syntax for a while loop: 

 

while condition:
    # code block to be executed

Here, condition is a boolean expression that is evaluated before each iteration of the loop. If the condition is True, the code block below the while statement is executed. This continues until the condition becomes False.

For example, let's say we want to print the numbers from 1 to 5 using a while loop: 

 

num = 1
while num <= 5:
    print(num)
    num += 1

This will output: 

 

1
2
3
4
5

In this example, we initialize the variable num to 1 before the loop. The condition num <= 5 is evaluated before each iteration of the loop. Inside the loop, we print the current value of num and then increment it by 1 with the line num += 1. The loop continues until num is no longer less than or equal to 5.

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