Operators & Control Flow

Learn how JavaScript uses operators to calculate, compare, and combine values, and how control flow helps a program make decisions.

What are Operators?

Operators are symbols used to perform operations on values. For example, + adds numbers and > compares values.

Operators are used throughout JavaScript programs for calculations, comparisons, assignments, and logical decisions.

JavaScript programming uses operators to work with values and expressions.

Common Types of Operators

How an Operator Works

Example 1: Arithmetic Operators

Arithmetic operators are used to perform basic mathematical calculations.

const students = 25;
const newStudents = 15;

const totalStudents = students + newStudents;
const remaining = totalStudents - 5;

console.log("Total Students:", totalStudents);
console.log("After 5 Students Leave:", remaining);
console.log("CIIT Training Institute - JavaScript");

Output

Comparison and Logical Operators

Comparison operators check values and return true or false. Logical operators can combine multiple conditions.

Example 2: Comparison and Logical Operators

In this example, we check whether a student's marks meet the required condition.

const marks = 82;
const attendance = 90;

const marksPassed = marks >= 40;
const attendancePassed = attendance >= 75;

const eligible = marksPassed && attendancePassed;

console.log("Marks Passed:", marksPassed);
console.log("Attendance Passed:", attendancePassed);
console.log("Eligible:", eligible);
console.log("Student: Neha");

Output

What is Control Flow?

Control flow means controlling the order in which statements are executed in a program.

JavaScript provides statements such as if...else, switch, and loops to control program execution.

What You Will Learn in This Module