How PHP adds two numbers

php How to add two numbers

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php The method of adding two numbers ：1、 Use “+” The addition operator , grammar “$num1 + $num2”;2、 Use “+=” Operator , You can assign the variable on the left of the operator plus the value of the expression on the right to the variable on the left , grammar “$num1 += $num2”.

The operating environment of this tutorial ：windows7 System 、PHP7.1 edition 、DELL G3 The computer

php Add two numbers

1、 Use “+” The addition operator

“+” Operators are used for addition calculation .

Example ：

<?php
    $a = -100;
    $b = 70;
    echo '$a + $b = '.($a + $b);
?>

2、 Use “+=” Operator

“+=” Add equal assignment operator , You can assign the variable on the left of the operator plus the value of the expression on the right to the variable on the left

Example ：

<?php
header("Content-type:text/html;charset=utf-8");
$a = 100;
$b = 70;
echo '$a += $b  The value of is ：'.($a += $b);
?>

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