Python for loop

In computer programming, a loop is a programming structure that repeats a sequence of instructions until a specific condition is met. Python has various types of loops, for loop is one of them. In this Python tutorial section, you will learn about for loop.


Objectives

  • Basic understanding of Python for loop

  • Else in Python For Loop


Basic understanding of Python for loop

Syntax

for value in sequence:
    statement(s)

Code

# For loop
color_names = ["Red", "Green", "Blue", "Yellow"]
for name in color_names:
    print(name)

Output

Red
Green
Blue
Yellow

Process finished with exit code 0

Above example you get list of colors, now you have to print them one after another. For solve the problem here used for loop where color_names are color list in is keyword and name is a variable where individual value come one after another by the for. Under the for statement using print function to print the name of color.


Else in Python For Loop

The else keyword in a for loop specifies a block of code to be executed when the loop is finished or some cases the loop not execute.

Syntax

for value in sequence:
    statement(s)
else:
    somethine else

Code

# For loop else execute when it's finish
color_names = ["Red", "Green", "Blue", "Yellow"]
for name in color_names:
    print(name)
else:
    print("Loop Completed")

print("\n ------ \n")

# For loop else execute when it has no item
color_names = []
for name in color_names:
    print(name)
else:
    print("Empty colors")

Output

Red
Green
Blue
Yellow
Loop Completed

 ------

Empty colors

Process finished with exit code 0


Python for loop video tutorial

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