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Example 23: To display the average of all numbers in an array
<!DOCTYPE HTML>
<HTML>
<HEAD>
<TITLE>JavaScript program to Calculate Average</TITLE>
<BODY>
<H2>JavaScript Functions</H2>
<P>Function to display the average of all numbers of an array</P>
<SCRIPT>
function Display_avg(arr1) {
var sum=0;
var leng=arr1.length;
for(i=1;i<leng;i++)
sum=sum+arr1[i];
return(sum/leng)
}
const arr1=[18,26,45,34,78];
var ans=Display_avg(arr1);
document.write("The average is " +ans);
</SCRIPT>
</BODY>
</HTML>
Output:
Example 24: To create a MyFunc( ) function that takes the user name as input and displays a message
<!DOCTYPE HTML>
<HTML>
<HEAD>
<TITLE>Display User Name</TITLE>
</HEAD>
<BODY>
<H2>Welcome Message Program</H2>
<SCRIPT>
// Function to take user name and display a message
function MyFunc() {
// Take user input
var userName = prompt("Enter your name:");
JavaScript Part 2 211

