abs() : absolute value

echo abs(-6.2); // Output 6.2
echo "<br>";
echo abs(-4); // Output 4
echo "<br>";
echo abs(3.2); // Output 3.2
echo "<br>";
echo abs(7); // Output 7

Changing all negative numbers of an array

We can take an array with both negative and positive numbers. We will use array_map() built in PHP function to change all negative elements to positive by using abs function.
<?Php
$a= array(1,-2,4,-7.3,105); 
$b=array_map("abs",$a); 
while (list ($key, $val) = each ($b)) { 
echo "$key -> $val <br>"; 
}
?>
Output is here.
0 -> 1 
1 -> 2 
2 -> 4 
3 -> 7.3 
4 -> 105

Questions


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