## Usage ```javascript var isSafeInteger = require( '@stdlib/math/base/assert/is-safe-integer' ); ``` #### isSafeInteger( x ) Tests if a finite [double-precision floating-point number][ieee754] is a safe `integer`. ```javascript var bool = isSafeInteger( 1.0 ); // returns true ```

## Notes - An integer valued number is "safe" when the number can be exactly represented as a [double-precision floating-point number][ieee754]. For example, ```javascript var MAX_SAFE_INTEGER = require( '@stdlib/constants/float64/max-safe-integer' ); // returns 9007199254740991 var x = 9007199254740992; // returns 9007199254740992 var y = 9007199254740993; // returns 9007199254740992 var bool = ( x === y ); // returns true ``` In this example, `x` and `y` should be distinct, but they are not due to constraints imposed by storing numeric values in [double-precision floating-point format][ieee754]. "Safe" integers are thus [double-precision floating-point numbers][ieee754] having integer values with unequivocal binary representations.

## Examples ```javascript var isSafeInteger = require( '@stdlib/math/base/assert/is-safe-integer' ); var bool = isSafeInteger( -5.0 ); // returns true bool = isSafeInteger( 2.0e200 ); // returns false bool = isSafeInteger( 3.14 ); // returns false bool = isSafeInteger( NaN ); // returns false ```