JavaScript
let studentName="Ravi";
let totalMarks=480;Page 10 of 30
Variable Naming Rules
Rules, mistakes, good variable names
1
Concept Meaning
Variable names should be meaningful, clear, and follow language rules.
2
Real-Life Analogy
A labeled box helps us find the correct item quickly. A good variable name helps us understand code quickly.
3
Expected Output
studentName, totalMarks, isPass
4
Common Mistake
Do not start with numbers, use spaces, or use symbols like @ and #.
Same Logic • Different Syntax
Code in 4 Languages
C++
string studentName="Ravi";
int totalMarks=480;Python
student_name="Ravi"
total_marks=480PHP
<?php
$studentName="Ravi";
$totalMarks=480;
?>Memory Tip
Clear names = clear coding.