Q1
What does a for loop do?
ARepeats a fixed number of times
BRepeats forever always
CNever repeats
DDeletes code
ICSEClass 9 (ICSE)Computer ApplicationsCh 4 · Topic 1
Control Structures - Iteration
Iteration control structures, like for and while loops, let a program repeat a set of instructions multiple times efficiently.
Core concept
A for loop repeats a fixed number of times, useful when we know exactly how many repetitions are needed, like printing numbers 1 to 10.
How it works
A while loop repeats as long as a condition remains true, useful when the number of repetitions isn't known in advance.
Why it matters
A do-while loop is similar to while but always executes at least once before checking the condition.
Key detail
Understanding iteration structures helps us write efficient programs that avoid repeating code manually for repetitive tasks.
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• A for loop repeats a fixed number of times.
• Example: printing numbers 1 to 10.
• A while loop repeats while a condition is true.
• Useful when repetitions aren't known in advance.
• A do-while loop always runs at least once.
• It checks the condition after running once.
• Iteration avoids manually repeating code.
• This makes programs efficient for repetitive tasks.