PHP - Variables and Data Types
Which of the following is the correct way to round a float to 2 decimal places in PHP?
Which of the following is the correct way to round a float to 2 decimal places in PHP?
easy📝 Syntax Q12 of 15
Step-by-Step Solution
Solution:
Step 1: Check round() function usage
The round() function takes a float and an integer number of decimal places as arguments.Step 2: Validate each option
round(3.14159, 2) uses round(3.14159, 2) which rounds to 2 decimals correctly. round(3.14159, '1') uses a string '1' which is invalid. round(3.14159) rounds to 0 decimals by default. round(3.14159, 0.02) uses 0.02 which is not a valid precision argument.Final Answer:
round(3.14159, 2) -> Option DQuick Check:
round(number, decimals) needs integer decimals [OK]
Quick Trick: Use round(value, 2) to get two decimals [OK]
Common Mistakes:
- Passing decimals as string instead of integer
- Using non-integer precision values
- Forgetting the second argument rounds to zero decimals
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