IF and Else

301.9 Selection

Selection — Note 1 of 4

Choose between two paths.

What you need to know

An if statement checks a condition — if True, the indented block runs. An optional else block runs when the condition is False. This lets the program choose between two paths.

What to know

if condition: runs block when True
else: runs when the condition is False
The condition must be a Boolean expression
Only one branch executes — never both

Code examples

IF and Else

python

age = int(input("Age: "))
if age >= 18:
    print("Adult")
else:
    print("Minor")

← Previous topicTranslate logic301.8 Boolean Expressions Next note →ELIF chains301.9 Selection

Back to Selection

Specification notes for programming are in Paper 2.

IF and Else

301.9 Selection

Practise exam questions

Selection — Note 1 of 4

Choose between two paths.

What you need to know

An if statement checks a condition — if True, the indented block runs. An optional else block runs when the condition is False. This lets the program choose between two paths.

What to know

if condition: runs block when True
else: runs when the condition is False
The condition must be a Boolean expression
Only one branch executes — never both

Code examples

IF and Else

python

age = int(input("Age: "))
if age >= 18:
    print("Adult")
else:
    print("Minor")

← Previous topicTranslate logic301.8 Boolean Expressions Next note →ELIF chains301.9 Selection

Back to Selection

Specification notes for programming are in Paper 2.