Translate logic

301.8 Boolean Expressions

Boolean Expressions — Note 3 of 3

Convert rules to Boolean.

What you need to know

Converting English rules into Boolean expressions is a key GCSE skill. Break the rule into parts, identify the comparisons, and connect them with and/or/not.

What to know

"Between 10 and 20" → x >= 10 and x <= 20
"Under 5 or over 65" → age < 5 or age > 65
"Not empty" → not name == "" or len(name) > 0
Write it in English first, then translate to code

Code examples

Translating rules

python

# Rule: "Pass if score is 50 or above AND attended > 80%"
score = 65
attendance = 85

if score >= 50 and attendance > 80:
    print("Pass")

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Back to Boolean Expressions

Specification notes for programming are in Paper 2.