How PHP uses the round () function to achieve rounding

Editor to share with you how PHP uses the round () function to achieve rounding, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

Round: rounded

The round () function rounds floating-point numbers.

Syntax: round (x, prec)

Parameters.

X is optional. The number that is required to be rounded.

Prec is optional. Specify the number of digits after the decimal point.

Description: returns the result that x is rounded according to the specified precision prec (the number of digits after the decimal point). Prec can also be negative or zero (default).

Tip: PHP does not correctly handle strings like "12300.2" by default.

Example:

Output:

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