lesson
A condition chooses the branch
1 · Learn
A Boolean condition is true or false. In Python, comparisons such as score >= 10 can control an if/else decision. Indentation groups the statements belonging to each branch; it is part of the syntax, not optional decoration.
Test equality boundaries as well as clearly high and low values. AND requires both conditions; OR requires at least one; NOT reverses a Boolean value. Use the language's actual lowercase and, or and not operators in Python code.
2 · Worked example
For score >= 10, scores 9, 10 and 11 give false, true and true. Replacing >= with > would incorrectly exclude 10 if the rule says at least ten.
3 · Your turn
For age >= 11 AND permission is true, would age 12 with permission false satisfy the condition?
Check your answer
No. Both conditions must be true for AND.
4 · Apply your learning
Create a truth table for two fictional Boolean inputs, then trace a decision for each combination.
Adult guidance and safety
Use an approved private programming or authoring environment and fictional data. Do not install unknown software or enter personal credentials for these exercises. Trace first, then run and test where a suitable tool is available; these text examples do not themselves provide an executable assessment environment.
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Check a calculation · Year 5 onward
Use this only when your teacher or adult allows a calculator for the task. Show your thinking first. It does not replace mental or written arithmetic and does not mark your lesson answer.
Powers, roots and trigonometry · Year 7 onward
Use only when the task allows a calculator. Choose one operation at a time and record your working. Trigonometry here always uses degrees (DEG), not radians. Inverse sine, cosine and tangent return an angle, not a reciprocal. Keep exact fractions and π in answers when requested.
Approximate numerical results use up to 12 significant digits. Inverse sine returns −90° to 90°, inverse cosine 0° to 180°, and inverse tangent −90° to 90°; these are principal values, not every possible solution of a trigonometric equation.
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