Q1
What does an if statement do?
ARuns code only if a condition is true
BAlways runs code regardless
CNever runs code
DDeletes code
ICSEClass 9 (ICSE)Computer ApplicationsCh 3 · Topic 1
Control Structures - Selection
Selection control structures, like if-else statements, let a program choose different actions based on whether a condition is true or false.
Core concept
An if statement executes code only if a condition is true, like 'if (score > 50) print Pass'.
How it works
An if-else statement provides an alternative action if the condition is false, like showing 'Fail' if the score isn't above 50.
Why it matters
A switch statement is useful when checking one variable against multiple possible values, offering a cleaner alternative to many if-else statements.
Key detail
Understanding selection structures is essential for creating programs that respond differently based on varying conditions.
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• An if statement runs code only if true.
• Example: if score>50, print Pass.
• If-else adds an alternative for false conditions.
• It shows Fail if score isn't above 50.
• A switch statement checks multiple possible values.
• It's cleaner than many if-else statements.
• Selection structures let programs make decisions.
• This is essential for varied program responses.