# isfinitef > Test if a single-precision floating-point numeric value is finite.
## Usage ```javascript var isfinitef = require( '@stdlib/math/base/assert/is-finitef' ); ``` #### isfinitef( x ) Tests if a single-precision floating-point `numeric` value is finite. ```javascript var bool = isfinitef( 3.14 ); // returns true bool = isfinitef( Infinity ); // returns false bool = isfinitef( -Infinity ); // returns false bool = isfinitef( NaN ); // returns false ```
## Examples ```javascript var PINF = require( '@stdlib/constants/float32/pinf' ); var NINF = require( '@stdlib/constants/float32/ninf' ); var isfinitef = require( '@stdlib/math/base/assert/is-finitef' ); var bool = isfinitef( 5.0 ); // returns true bool = isfinitef( -2.0e32 ); // returns true bool = isfinitef( PINF ); // returns false bool = isfinitef( NINF ); // returns false bool = isfinitef( NaN ); // returns false ```