What will be the output of this Swift code?

medium📝 Predict Output Q4 of 15

Swift - Loops

let nums = [10, 20, 30]
for num in nums {
  print(num)
}

A10 20 30

B30 20 10

C10 20 30 10

DError: Cannot iterate over array

Step-by-Step Solution

Solution:

Step 1: Understand the for-in loop behavior
The loop prints each element in the array in order.
Step 2: Trace the output
It prints 10, then 20, then 30 each on a new line.
Final Answer:
10 20 30 -> Option A
Quick Check:
for-in loop output = elements in order [OK]

Quick Trick: for-in prints elements in order by default [OK]

Common Mistakes:

Master "Loops" in Swift

9 interactive learning modes - each teaches the same concept differently

Want More Practice?

15+ quiz questions · All difficulty levels · Free

More Swift Quizzes