What is the function of the bcadd function in PHP?

The bcadd function is a mathematical function in PHP used for adding two arbitrary-precision numbers. It is primarily used for handling addition of large numbers, capable of processing numbers beyond the range of PHP floating point numbers while maintaining accuracy. The syntax of the bcadd function is as follows:

Concatenate two strings, left_operand and right_operand, with an optional scale parameter of 0.

$left_operand and $right_operand are two operands to be added, which must be in the form of string numbers. $scale is an optional parameter used to set the number of decimal places in the result, with a default value of 0 indicating an integer result.

The bcadd function returns a string that represents the result of adding two operands together. For example:

$a is equal to “12345678901234567890” and $b is equal to “98765432109876543210”.

Add the values of $a and $b and store the result in the variable $result using the function bcadd.

echo $result; // Output: 111111111011111111100

In the example above, $a and $b are two very large numbers. By using the bcadd function to add them, the result is a string “111111111011111111100”, maintaining accuracy.