Stability: 0 - Deprecated: Use typeof value === 'number' instead.

    • object {any}
    • Returns: {boolean}

    Returns true if the given object is a Number. Otherwise, returns false.

    1. const util = require('util');
    3. util.isNumber(false);
    4. // Returns: false
    5. util.isNumber(Infinity);
    6. // Returns: true
    7. util.isNumber(0);
    8. // Returns: true
    9. util.isNumber(NaN);
    10. // Returns: true