if, elif, else

Use if to run code only when something is true.

age = 20
if age >= 18:
    print("Adult")
else:
    print("Minor")

Two important rules:

• The line with if ends with a colon :.
• The code inside is indented (4 spaces). Indentation is how Python knows what is inside the if.

Use elif ("else if") to check more conditions, in order:

marks = 72
if marks >= 90:
    print("A")
elif marks >= 75:
    print("B")
elif marks >= 50:
    print("C")
else:
    print("Fail")

Comparison operators

== equal, != not equal, > greater, < less, >= greater or equal, <= less or equal.

= stores a value, == compares two values. Mixing them up is the most common beginner mistake.