Kotlin - Loops and Ranges
You want to print all even numbers from 20 down to 2 using a Kotlin
for loop. Which code snippet achieves this correctly?You want to print all even numbers from 20 down to 2 using a Kotlin for loop. Which code snippet achieves this correctly?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Identify correct descending range and step
Counting down from 20 to 2 by 2 uses20 downTo 2 step 2.Step 2: Confirm output matches even numbers descending
This loop prints 20, 18, 16, ..., 2, all even numbers descending.Final Answer:
for (i in 20 downTo 2 step 2) { print(i) } -> Option DQuick Check:
downTo with step 2 prints even numbers descending [OK]
Quick Trick: Use downTo with step 2 for descending even numbers [OK]
Common Mistakes:
MISTAKES- Using ascending range for descending numbers
- Wrong step value
- Filtering inside loop instead of stepping
Master "Loops and Ranges" in Kotlin
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