Loops - for loop in python with examples

Python For Loop Examples

In Python, a for loop is used to iterate over a sequence (such as a list, tuple, string, or range) or any other iterable object. The basic syntax of a for loop in Python is as follows:

        
for variable in iterable:
    # Code to be executed for each item in the iterable
        
    

Here's a breakdown of how it works:

• variable: This is a variable that takes on the value of each item in the iterable during each iteration of the loop. You can choose any valid variable name.
• iterable: This is the sequence or iterable object you want to loop through. It can be a list, tuple, string, range, or any other iterable data type.
• Indentation: Python uses indentation (typically four spaces) to define a block of code that belongs to the for loop. All code indented under the for loop will be executed for each item in the iterable.

Here are some examples of how for loops can be used in Python:

Looping through a list:

        
fruits = ["apple", "banana", "cherry"]
for fruit in fruits:
    print(fruit)
        
    

Looping through a string:

        
word = "Python"
for letter in word:
    print(letter)
        
    

Using the range function to loop a specific number of times:

        
for i in range(5):  # This will loop from 0 to 4
    print(i)
        
    

Looping through a dictionary (iterating through keys):

        
person = {"name": "Alice", "age": 30, "city": "New York"}
for key in person:
    print(key, person[key])
        
    

Looping through a dictionary (iterating through key-value pairs using the items() method):

        
person = {"name": "Alice", "age": 30, "city": "New York"}
for key, value in person.items():
    print(key, value)
        
    

for loops are versatile and can be used to iterate over various types of iterable objects in Python.

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