The isfinite function returns whether input is a finite value (is neither infinite nor NaN).

Syntax ​

isfinite( X )

Arguments ​

• X: A real number.

Results ​

A non-zero value (true) if X is finite, and zero (false) otherwise.

Examples ​

This returns true:

print isfinite( 420 )

This returns false:

print isfinite( hello )