PHP provides nearly fifty functions that can perform various mathematical functions. Combined with mathematical operators, they can make your homework a lot easier!

The simplest math functions are those that only require a single parameter. This parameter is usually a number, which is accepted either as a variable or a string. The ceil() function, for example, will return a number rounded up to the nearest full number.

```
<?php
```

$num = 55;

echo ceil($num);

// Result Will Be: 55

$result = ceil(295.34);

echo $result;

// Result Will Be: 296

?>

As you can see, the results of these functions can be echoed, stored in a variable, etc.

Some math functions accept multiple parameters. The rand() function, for example, generates a random number in between the two numbers that it is given. Multiple parameter are separated by commas.

```
<?php
```

echo rand(0, 500);

// Result Is: 99

?>

If you refresh the page, you will see the above result change each time to a random number between 0 and 500.

Below is a list of almost twenty useful math functions, along with a brief description and required parameters.

Function(Parameters) | Description |
---|---|

rand(min_number, max_number) | Returns a Random Integer |

ceil(number) | Returns the Value of a Number Rounded Upwards to the Nearest Integer |

floor(number) | Returns the Value of a Number Rounded Downwards to the Nearest Integer |

abs(number) | Returns the Absolute Value of a Number |

base_convert(number) | Converts a Number From One Base to Another |

bindec(binary_number) | Converts a Binary Number to a Decimal Number |

decbin(decimal_number) | Converts a Decimal Number to a Binary Number |

dechex(decimal_number) | Converts a Decimal Number to a Hexadecimal Number |

decoct(decimal_number) | Converts a Decimal Number to an Octal Number |

fmod(number, divisor) | Returns the Remainder (Modulo) of the Division of the Arguments |

hexdec(hex_number) | Converts a Hexadecimal Number to a Decimal Number |

is_finite(number) | Returns True if a Value is a Finite Number |

is_infinite(number) | Returns True if a Value is an Infinite Number |

is_nan(value_to_check) | Returns True if a Value is Not a Number |

max(number1, number2) | Returns the Number With the Highest Value of Two Specified Numbers |

min(number1, number2) | Returns the Number With the Lowest Value of Two Specified Numbers |

pi() | Returns the Value of PI |

pow(x, y) | Returns the Value of "x" to the Power of "y" |

round(number, optional) | Rounds a Number to the Nearest Integer (Number of Digits After Decimal Point Optional) |

sqrt(number) | Returns the Square Root of a Number |

A complete list of the math functions available can be found in the official PHP manual. Each function includes examples that will help you understand how to use it.