PHP - Variables and Data Types
What will be the output of the following PHP code?
$a = 0.1 + 0.2;
echo number_format($a, 1);
What will be the output of the following PHP code?
medium📝 Predict Output Q4 of 15
Step-by-Step Solution
Solution:
Step 1: Calculate the sum of 0.1 and 0.2 in PHP
Due to float precision, 0.1 + 0.2 is approximately 0.30000000000000004.Step 2: Apply number_format with 1 decimal place
number_format rounds the value to 1 decimal place, resulting in '0.3'.Final Answer:
0.3 -> Option BQuick Check:
Float sum rounded = D [OK]
Quick Trick: Use number_format to round floats for display [OK]
Common Mistakes:
- Expecting exact 0.3 without rounding
- Confusing output with raw float
- Ignoring number_format effect
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