Page 208 - Web Applications (803) Class 12
P. 208
The return Statement
Frequently, functions calculate a return value. The caller is “returned” the return value. If a statement called
the function, JavaScript control will “return” to run the statements that come after the function invoking
statement. A return statement in JavaScript causes the function to terminate.
Example:
<html>
<body>
<h2>JavaScript Functions</h2>
<p>Function to convert temperature from Fahrenheit to Celsius</p>
<script>
function Convert_to_Celsius(f) {
return (5/9) * (f-32);
}
result=Convert_to_Celsius(76.5);
document.write("The Celsius temperature is "+result);
</script>
</body> </html>
Output of the preceding program is as follows:
Practice Question 1:
<html>
<body>
<h2>JavaScript Functions</h2>
<p>Function to display the greatest of three numbers</p>
<script>
function gr_num(p,q,r) {
if (p>q && p>r)
return p;
else if (q>p && q>r)
return q;
else
return r;
}
result=gr_num(56,78,23); //Assuming all 3 numbers are different
206 Touchpad Web Applications-XII

