The **`cbrt()` function** in Ruby returns the *cube root* of a number. 

Figure 1 below shows the mathematical representation of the `cbrt()` function.

> The `Math` module is required to use this function.

# Syntax

``` ruby
cbrt(number)
```

# Parameter

`cbrt()` requires a number as a parameter.

# Return value

`cbrt()` returns the cube root of the number sent as a parameter.

# Code

The following example shows how to use `cbrt()` in Ruby.

print "cbrt(8):", Math.cbrt(8), "\n"

print "cbrt(0):", Math.cbrt(0), "\n"

print "cbrt(-25):", Math.cbrt(-25), "\n"

print "cbrt(4.5):", Math.cbrt(4.5), "\n"

What is Math.cbrt() in Ruby?

The `cbrt()` function in Ruby, within the Math module, returns the cube root of a given number.