Python For Loop

In Python, a for loop is used to iterate over a sequence (such as list, tuple, string or dictionary) and execute a block of code repeatedly for each element in the sequence.

Syntax

for element in sequence:
    # statements to be executed inside the loop

• element: refers to the current element in the sequence that is being processed at a given iteration of the loop.
• sequence: is the sequence of elements that the loop is iterating over.

Example

fruits = ["Apple", "Banana", "Cherry"]
for fruit in fruits:
    print(fruit)

Output

Apple
Banana
Cherry

Explanation

In this example, we have a list fruits containing three strings. The for loop iterates over the elements of the list one by one and assigns each item to the variable fruit. The print statement prints each of the elements in the list.

Use

For loops are useful when you want to perform the same action on each element in a sequence. They are commonly used for iterating over lists, tuples, sets, and dictionaries.

Important Points

• The range() function is often used with for loops to specify the number of times a loop should run.
• The break statement can be used to terminate a for loop prematurely.
• The continue statement can be used to skip the current iteration of a for loop and move on to the next iteration.
• In Python, for loops can also be used to iterate over the characters in a string.

Summary

In Python, for loops are used to iterate over a sequence and execute a block of code repeatedly for each element in the sequence. They are useful for manipulating lists, tuples, sets, and dictionaries. With the help of range(), break and continue, for loops can be used to perform certain actions like conditional execution, printing elements, etc.