function add(augend, addend) {
	      return (+augend || 0) + (+addend || 0);
	    }
Adds two numbers.

@static
@memberOf _
@category Math
@param {number} augend The first number to add.
@param {number} addend The second number to add.
@returns {number} Returns the sum.
@example

_.add(6, 4);
// => 10