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JavaScript Basics and Control Structures

📑 5 slides 👁 3 views 📅 3/2/2026
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Introduction to JavaScript

JavaScript is a programming language used for web development.

Introduction to JavaScript
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Variables and Data Types

  • Variables store data. Example: let age = 25;
  • Data types: string (text), number, boolean (true/false), etc.
  • Use 'const' for constants and 'let' for variables that change.
Variables and Data Types
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Operators in JavaScript

  • Arithmetic operators: +, -, *, / for calculations.
  • Comparison operators: ==, ===, !=, >, < to compare values.
  • Logical operators: && (AND), || (OR), ! (NOT) for conditions.
Operators in JavaScript
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Control Structures: if-else

  • if-else executes code based on conditions.
  • Example: if (age >= 18) { console.log('Adult'); } else { console.log('Minor'); }
  • Use 'else if' for multiple conditions.
Control Structures: if-else
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Control Structures: switch

  • switch checks a value against multiple cases.
  • Example: switch(day) { case 'Monday': console.log('Workday'); break; }
  • More efficient than multiple if-else for many conditions.
Control Structures: switch
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