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Class-3
Class 3 – Introduction to JavaScript
Slides: Class3
Introduction to Arithmetic Operators in JavaScript
In this lecture, we are covering the fundamental aspects of arithmetic operators in JavaScript, including:
Arithmetic Operators:
- Definitions and examples of operators used for mathematical calculations such as addition, subtraction, multiplication, division, modulus, increment, and decrement.
- Importance of arithmetic operations in various applications like mathematical calculations, data manipulation, algorithm implementation, financial calculations, gaming logic, animation, form validation, statistical analysis, data visualization, conditional logic, and performance optimization.
String Operations:
- String Concatenation: Using
+operator to concatenate strings. - String Length: Retrieving length using
.length. - Accessing Characters: Using index to access characters in a string.
- Changing Case: Converting strings to uppercase or lowercase.
- Finding and Extracting Substrings: Using methods like
.indexOf()and.slice(). - Replacing Substrings and Splitting Strings: Using
.replace()and.split(). - Template Literals: Using backticks and
${}for embedding expressions. - String Methods: Methods like
.trim(),.repeat(),.includes(),.startsWith(), and.endsWith()for various string manipulations.
Increment and Decrement Operators:
- Detailed usage of prefix and postfix increment and decrement operators with examples.
- Explanation of differences between prefix and postfix usage in different scenarios.
This lecture will provide a solid foundation for understanding the essential arithmetic and string operations in JavaScript, helping you write clear, effective, and error-free code.