What will be the output of this Swift code?

medium📝 Predict Output Q4 of 15

Swift - Loops

var i = 1
while i < 4 {
    print(i)
    i += 1
}

A1 2 3 4

B2 3 4

C1 2 3

D0 1 2 3

Step-by-Step Solution

Solution:

Step 1: Trace the loop iterations
Starts with i=1, prints 1, increments to 2; prints 2, increments to 3; prints 3, increments to 4; loop stops because 4 is not less than 4.
Step 2: List printed values
Printed values are 1, 2, and 3.
Final Answer:
1 2 3 -> Option C
Quick Check:
Loop prints 1 to 3 = 1 2 3 [OK]

Quick Trick: Check loop condition before each iteration [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