ElseinLoop.md

Else in Loop

Introduction :

• In most of the programming languages (C/C++, Java, etc), the use of else statement has been restricted with the if conditional statements. But Python also allows us to use the else condition with for loops.
• Such type of else is useful only if there is an if condition present inside the loop which somehow depends on the loop variable.

What is the use of else in the loop?

• The else block just after for/while is executed only when the loop is NOT terminated by a break statement.

Here else block will be executed because for loop doesn't contain any break statement

for i in range(1, 4):
  print(i)
else:
  print("this will be executed")

Output:

1
2
3
this will be executed

Here else block will not executed because for loop contains break statement

for i in range(1, 4):
  print(i)
  break
else:
  print("this will not executed")

Output:

1

Note

if for loop contain an if statement and if statement contains break. Consider that if statement not executed this time else block of for loop will be executed

Explain in details with example

E.g. if 5 exists in any string, if yes print accordingly.

Code:

strings="HELLO"
for i in strings:
  if i== '5':
    print("5 found")
    break
else:
    print("5 not found")

Output:

5 not found