Python if-elif-else

if-elif-else are conditional statements that provide you with the decision making that is required when you want to execute code based on a particular condition.

The if-elif-else statement used in Python helps automate that decision making process. Python if-elif-else

if (condition):
    statement
elif (condition):
    statement
.
.
else:
    statement

if:

age = 18
  
if (age >= 18):
    print("You are eligible for Vote")

You are eligible for Vote

if-else:

The else keyword introduces a code block which is executed if and only if all previous if and elif conditionals are False.

age = 18
  
if (age >= 18):
    print("You are eligible for Voting")
else:
    print("You are not eligible for Voting")

You are not eligible for Voting

if-else-elif :

The elif keyword is always followed by a conditional expression and must follow a previous if or elif statement. it introduces a code block which is executed only if all previous if or elif conditions are false and the current conditional is True.

number = 3
if (number == 1):
    print("number is 1")
elif (number == 2):
    print("number is 2")
elif (number == 3):
    print("number is 3")
else:
    print("number is not present")

Number is 3

In the above example line 7 is only executed when the input is equal to 3.

Line 5 is only executed if the condition on line 3 is False and the condition on line 4 is True.

Remember that elif is a shorthand for else if but in Python to write the above without elif with the same logic you will need to do either:

1. The if-elif-else statement used in Python helps automate that decision making process.
2. if-elif-else are conditional statements that provide you with the decision making that is required when you want to execute code based on a particular condition.