If you assign a value to a variable that has not been declared(var), it will automatically become a GLOBAL variable.
Code:-
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<h1>Auto Global</h1>
<p>If you not assign var the variable is automatically converted to global variable</p>
<input type="button" onclick="cal_fun1();" value="Function 1">
<input type="button" onclick="cal_fun2();" value="Function 2">
<script>
function cal_fun1()
{
//not assign var so it is consider as global variable
carname = "bus";
alert(typeof(carname));
}
function cal_fun2()
{
alert(typeof(carname));
}
</script>
</body>
</html>
What is a auto global variables :- Geniusofstudent
Reviewed by Network security
on
June 09, 2019
Rating:
Reviewed by Network security
on
June 09, 2019
Rating:
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