Sure! Here’s a simple JavaScript program for class 7:

```javascript // Program to calculate the average of three numbers

// Function to calculate the average function calculateAverage(num1, num2, num3) { return (num1 + num2 + num3) / 3; }

// Taking input from the user let number1 = parseInt(prompt(“Enter the first number:”)); let number2 = parseInt(prompt(“Enter the second number:”)); let number3 = parseInt(prompt(“Enter the third number:”));

// Calculating the average let average = calculateAverage(number1, number2, number3);

// Displaying the result console.log(“The average of the three numbers is: “ + average); ```

This program calculates the average of three numbers entered by the user. It defines a function calculateAverage that takes three numbers as input and returns their average. It then prompts the user to enter three numbers, calculates their average using the calculateAverage function, and displays the result using console.log.