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Ð a = 7 + (7 + 9 - 8 + 8)
Ð a = 23
ÐIf var a = 10, b = 5, then what is the final value of a after solving the following expression in JavaScript:
Ð
Ð a -= a * b + a - b + a/b - 2
Ð Output:
Ð a = a - (a * b + a - b + a/b - 2)
Ð a = 10 - (10 * 5 + 10 - 5 + 10/5 - 2)
Ð a = 10 - (50 + 5 + 2 - 2)
Ð a = 10 - 55
Ð a = -45
Lab Assignment ‘n Activity #Interdisciplinary
1. Calculate the following expressions:
(12*11) + 25 – 10
22/2*5 + 4 – (12+6) – 6
34 +7 – 15/3 * 7 + 4
2. Check the output of the following code. Explain the output.
<html>
<body>
<script>
a=45
b=4
document.write(++a)
document.write(b++)
</script>
</body>
</html>
Functions Used in JavaScript
A function is a reusable code-block that will be executed whenever it is called. The function is a great time saver. It
is used for performing repetitive tasks where you can call the same function multiple times to get the same effect. It
allows code reusability.
JavaScript provides a number of built-in functions, which are as follows:
Ð ÐisNaN( ): It return true, if the object is NOT a number, it returns false, if the object is a number.
For example:
<!DOCTYPE html>
<HTML>
<HEAD>
<TITLE> NaNfunction </TITLE>
</HEAD>
<BODY>
344 Touchpad Web Applications-XI

