The following example will demonstrate the Tip:
var x;
x = 0;
var y;
y = '0';
x is numeric, while
y is
char.
On comparing them using the "==" operator, it will give
true !
alert('x == y : ' + (x==y));
To do so, we will use the '
===' operator:
alert('x === y : ' + (x===y));
which checks on the
Value and
Type, so it will give
false.
Same for the
!== operator.
alert('x != y: '; + (x != y));
it gives false !!
alert('x !== y: '; + (x !== y));
it gives true
So, to assure an accurate comparison
datatype and
value don't use the normal operators
== and
!= but use
=== and
!== operators.
