In PHP, you can use the "%" and "==" operators to determine whether two numbers are divisible; you only need to use the "%" operator to divide the two numbers to get the remainder, and then use The "==" operator can be used to determine whether the obtained remainder is 0. The syntax is "Number 1 % Number 2 == 0". If it is 0, it can be divisible. If it is not 0, it cannot be divisible.
The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer
To determine whether two numbers are divisible, you can put it another way, It is to determine whether the remainder of dividing two numbers is 0.
In PHP, you can use the "%" and "==" operators to determine whether two numbers are divisible.
"%
" is the remainder operator, which can divide two operands and obtain the remainder.
"==" is an equality operator that compares and tests whether the variable (expression or constant) on the left has the same value as the variable (expression or constant) on the right .
Example:
<?php header("Content-type:text/html;charset=utf-8"); $num1=8; $num2=2; if($num1 % $num2 == 0){ echo "$num1 和 $num2 ,两个数能整除"; }else{ echo "$num1 和 $num2 ,两个数不能整除"; } ?>
##Extended knowledge: arithmetic operators and comparison operators
Arithmetic operators
Arithmetic operators are a set of symbols often used to process four arithmetic operations, namely: " ", "-", "*" "/ ""%" and so on; when processing numbers, most arithmetic operators are used.Name | Result | |||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
negates the negative value of | ##a. | |||||||||||||||||||||||||||||||||||||
Addition | ##a and ## The sum of #b. a - b | |||||||||||||||||||||||||||||||||||||
a | and b difference. a * b | |||||||||||||||||||||||||||||||||||||
a | and# The product of ##b. a / b | Division|||||||||||||||||||||||||||||||||||||
a | divided by b’s quotient. a % b | Modulo (remainder of division)|||||||||||||||||||||||||||||||||||||
a | The remainder after dividing b. a ** b | Find the exponentiation|||||||||||||||||||||||||||||||||||||
a | bThe value of the power. Introduced in PHP 5.6 version. The division operator always returns a floating point number. The only exception is the following:
The operands of the remainder operator will be converted to integers (except for the decimal part) before operation. The result of the remainder operator Comparison Operators Comparison operators, as their name implies, allow two values to be compared. When an operator is used to compare two values, the result is a logical value, either TRUE (true) or FALSE (not true). The comparison operators in PHP are shown in the following table:
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