numberp

numberp( 
g_value 
) 
=> t / nil

Checks if a data object is a number, that is, either an integer or floating-point number.

The suffix p is usually added to the name of a function to indicate that it is a predicate function.

g_value

A data object.

`t`	The data object is a number.
`nil`	The data object is not a number.

numberp( 3 )

=> t

numberp('isASymbol)

=> nil

numberp( 3.5)

=> t