Page 135 - KEC Khaitan C5 Flipbook
P. 135
Performing Calculations
Variables can be used in mathematical operations, making programs more interactive.
Example: To perform calculations.
var num1 = 10;
var num2 = 5;
var sum = num1 + num2;
Controlling Program Behaviour
Variables help control decision-making using if or if-else statements.
Example: To control program behaviour using if block.
if (score >= 10) {
setText("message", "You won!");
}
Storing User Input
Variables store user responses from input fields, making apps interactive.
Example: To store user input.
var userName = getText("nameInput");
setText("greeting", "Hello, " + userName + "!");
Function Parameters and Return Values
Functions use variables as parameters and return values.
Example: To use functions to return value.
function addNumbers(a, b) {
return a + b;
}
var total = addNumbers(4, 6);
setText("outputLabel", "The sum is: " + total);
Working with Variables and Conditional Logic 133

