Swift - Loops
Which of the following Swift code snippets correctly demonstrates a
repeat-while loop that prints numbers from 1 to 3?Which of the following Swift code snippets correctly demonstrates a repeat-while loop that prints numbers from 1 to 3?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the repeat-while loop
A repeat-while loop executes the block first, then checks the condition.Step 2: Analyze each option
var i = 1 repeat { print(i) i += 1 } while i <= 3 correctly initializes i to 1, prints i, increments it, and continues while i is less than or equal to 3, printing 1, 2, 3.
var i = 1 while i <= 3 { print(i) i += 1 } uses a while loop, not repeat-while.
var i = 1 repeat { print(i) i += 1 } while i < 1's condition i < 1 is false after first iteration, so it only prints once.
var i = 1 repeat { print(i) i += 1 } while i == 1's condition i == 1 is false after first increment, so it only prints once.Final Answer:
Option A -> Option AQuick Check:
repeat-while runs at least once and checks condition after loop body [OK]
Quick Trick: repeat-while checks condition after executing loop body [OK]
Common Mistakes:
- Confusing repeat-while with while loop syntax
- Placing condition before loop body
- Using incorrect comparison operators in condition
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