Python For Loop

In this tutorial you'll learn how a count controlled for loop works in Python.

In Python, the for statement is designed to work with a sequence of data items (that is either a list, a tuple, a dictionary, a set, or a string).

The for loop is typically used to execute a block of code for certain number of times.

The for loop

The body of the loop is executed once for each item in the sequence.

Example

Print Python 5 times:

for number in [1, 2, 3, 4, 5]:
    print("Python")

Output

Python
Python
Python
Python
Python

The range Function with for Loop

The range() function creates a type of object known as an iterable to simplifies the process of writing a count-controlled for loop. The range() function returns a sequence of numbers, which starts from 0, increase by 1 each time the loop runs and ends at a specified number.

Example

Print Python 5 times:

for number in range(5):
    print("Python")

The range with start and increment

With range() function it is possible to specify the starting value by adding second parameter and increment value by adding third parameter.

Example

# Starts with 5 upto 9
for number in range(5, 10):
    print(number)
 
 
# Starts with 5 upto 30 increment by 3
for number in range(5, 30, 3):
    print(number)

Looping Over Data Types

You can iterate list, dictionary or tuple items by using a for loop.

Example

testList = ["Canada", "Japan", "London", "Germany", "Africa"]
for item in testList:
    print(item)
 
 
theDictionary = {'Canada': 100, 'Japan': 200, 'Germany': 300, 'Italy': 400}
for item in theDictionary:
    print(item)
 
 
thetuple = ("India", "Canada", "Japan", "Italy")
for item in thetuple:
    print(item)

Python Programming

Python For Loop

The for loop

The range Function with for Loop

The range with start and increment

Looping Over Data Types