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In php, the remainder operator "%" and the equality operator "==" can be used to determine whether a number is even or not, with the syntax "numeric % 2 ==0." An even number is a number divisible by 2. Just use "%" to get the remainder of dividing the specified number by 2, and then use "==" to determine whether the remainder is 0; if the remainder is 0, the number is even.

Operating environment of this tutorial: Windows 7 system, PHP7.1 version, DELL G3 computer

PHP determines if a number is even.

In php, to determine whether a number is even, you only need to determine whether the number is divisible by 2.

In other words, it is the remainder of dividing by 2, and the remainder is 0.

The remainder operator "%" and the equality operator "==" are used to determine whether a number is divisible by 2, that is, whether it is even.

Implementation code:

Description:

The remainder operator "%" is used to find the remainder of a division operation.

"%" operates primarily on integers, but also on floating point numbers. If the dividend ($a) is negative, then the result obtained is also negative.

The equality operator "==" returns TRUE if the values of $a and $b are equal after type conversion, otherwise returns FALSE

The congruence operator "===" returns TRUE if $a and $b are not only equal in value but also equal in type, otherwise returns FALSE

Focus on distinguishing between "equal" and "congruent":

Equal == simply compares the values of two variables

Equivalence == compares not only the values of the expression on both sides of the operator, but also the data type, and the result is TRUE only if both values and data types are equal.

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