input value
input value
var v = identity( -1.0 );
// returns -1.0
var v = identity( 2.0 );
// returns 2.0
var v = identity( 0.0 );
// returns 0.0
var v = identity( -0.0 );
// returns -0.0
var v = identity( NaN );
// returns NaN
Evaluates the identity function for double-precision floating-point number
x
.