How to convert positive number to negative number in php

1. Create a PHP sample file.

2. Define a positive variable.

3. Use the "$number *= -1;" method to convert a positive number into a negative number.

Example

 $number = 99;
$number *= -1;
echo $number; //output -99

Attached:

Convert negative number to positive number

 $number = -11;
$result = abs($number);
echo $result; //output 11

The above is the method of converting positive numbers to negative numbers in PHP. I hope it will be helpful to everyone. More PHP learning guide: source code network