PHP - Operators
Which of the following is the correct syntax to subtract 4 from variable
$num and update it?Which of the following is the correct syntax to subtract 4 from variable $num and update it?
easy📝 Syntax Q3 of 15
Step-by-Step Solution
Solution:
Step 1: Understand compound subtraction syntax
The correct syntax to subtract and assign is$num -= 4;.Step 2: Identify incorrect options
=-is invalid syntax,= -4assigns negative 4, and$num - 4;does not update the variable.Final Answer:
$num -= 4; -> Option AQuick Check:
Subtract and assign uses -= operator [OK]
Quick Trick: Use -= to subtract and update variable [OK]
Common Mistakes:
- Writing =- instead of -=
- Assigning negative value instead of subtracting
- Not updating variable with assignment
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