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Python For Loop

Python For Loop

In this tutorial, we will learn about for loops in Python. We will cover the basics of iterative execution using for loops.

What is a For Loop

A for loop is a control flow statement that allows code to be executed repeatedly based on a given Boolean condition. The loop is typically used when the number of iterations is known before entering the loop.


The syntax for the for loop in Python is:

for item in iterable:
    # Code block to be executed

The for loop iterates over each item in the iterable object (such as a list, tuple, or string) and executes the code block for each item.

Printing Numbers from 1 to 10

  1. Use a for loop to print numbers from 1 to 10.

Python Program

for i in range(1, 11):
    print(i, end=' ')


1 2 3 4 5 6 7 8 9 10 

Calculating the Factorial of a Number

  1. Use a for loop to calculate the factorial of a number.

Python Program

n = 5
factorial = 1
for i in range(1, n + 1):
    factorial *= i
print(f"Factorial of {n} is {factorial}")


Factorial of 5 is 120

Summing the Elements of a List

  1. Use a for loop to calculate the sum of the elements in a list.

Python Program

arr = [1, 2, 3, 4, 5]
sum = 0
for num in arr:
    sum += num
print(f"Sum of the elements in the list is {sum}")


Sum of the elements in the list is 15