Python for loop_python

In this article, you'll learn what is for loop in Python and how to write it. We use a for loop when we want to repeat a code block a fixed number of times.

A for loop is a part of a control flow statement which helps you to understand the basics of Python.

What is for loop in Python?

In Python, the for loop is used to iterate over a sequence such as a list, string, tuple, other iterative objects such as range.

With the help of for loop, we can iterate over each item present in the sequence and execute the same set of operations for each item. Using a for loops in Python we can automate and repeat tasks in an efficient manner.

So the bottom line is using the for loop we can repeat the block of statements a fixed number of times. Let's understand this with an example.

As opposed to while loops that execute until a condition is true, for loops are executed a fixed number of times, you need to know how many times to repeat the code.

An unknown number of times: For example, ask the user to guess the lucky number. You don't know how many attempts the use will need to guess correctly. It can be 1, 20, or maybe indefinite. In such cases, use a while loop.
Fixed number of times: Print the multiplication table of 2. In this case, you know how many iterations you need. Here you need 10 iterations. In such as case use for loop.

Syntax of for loop

for i in range:
    statement 1
    statement 2
    statement n

In the syxtax, i is the iterating variable, and the range specifies how many times the loop should run. For example, if a list contains 10 numbers then for loop will execute 10 times to print each number.
In each iteration of the loop, the variable i get the currect value.

Print first 10 numbers using a for loop

Example:

Here we used the range() function to gererate integers from 0 to 9
Next, we used the for loop to iterate over the numbers produced by the range() function.
In the body of a loop, we printed the current number.