PHP - Loops
What will be the output of this PHP code?
$sum = 0;
for ($i = 1; $i <= 3; $i++) {
$sum += $i;
}
echo $sum;What will be the output of this PHP code?
medium📝 Predict Output Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Trace the loop iterations
The loop runs with $i = 1, 2, 3. Each time, $sum adds $i: 0+1=1, 1+2=3, 3+3=6.Step 2: Calculate final sum
After the loop, $sum is 6, which is printed by echo.Final Answer:
6 -> Option AQuick Check:
Sum 1+2+3 = 6 [OK]
Quick Trick: Add loop variable each iteration to sum [OK]
Common Mistakes:
- Concatenating numbers instead of adding
- Starting loop at 0 instead of 1
- Using wrong loop condition
Master "Loops" in PHP
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