Think of parseInt() as what it says- parsing out the number value. Number() can be considered as a cast. parseInt('12', 10); => 12 Number('12');

Think of parseInt() as what it says- parsing out the number value. Number() can be considered as a cast. parseInt('12', 10); => 12 Number('12'); => 12 parseInt('12x', 10); => 12 Number('12x'); => NaN