php How to turn a negative number into a positive integer

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php The method of converting negative numbers to positive integers ：1、 Use abs() The function converts a negative number to a positive number , Use intval() The function rounds a positive number , Convert to positive integer , grammar “intval(abs($number))”;2、 utilize “~” The bitwise operator negates a negative number and adds one , grammar “~$number + 1”.

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

php The method of converting negative numbers to positive integers

Method 1： Use abs() and intval() function

• abs() The function converts a negative number to a positive number

• intval() The function rounds a positive number , Convert to positive integer

Implementation code ：

<?php$number=-12.35;var_dump($number);$result =intval(abs($number));var_dump($result);?>

Method 2： utilize “~” The bitwise operator negates a negative number and adds one

<?phpfunction plus_minus_conversion($number = 0){    echo ~$number + 1;}echo plus_minus_conversion(-100.58);?>

explain ：

Take the positive number and add one to the negative number , Get the complement of a negative number , Negative numbers are stored in memory in the form of complement , When the complement is converted to the original code, it is the negative number corresponding to the positive number

Negative numbers take the inverse and add one , Get a complement , But the complement of a positive number is the same as the original code

Be careful ： Negation and negation are two different concepts , All operations are in the form of complement , Because there are negative numbers involved

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