String Built in methods

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Sun Nov 03 2024 15:05:37 GMT+0000 (Coordinated Universal Time)

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// stringMethods.js

// Example string for demonstration
const str = "  Hello World  ";

// 1. charAt(index): Returns the character at the specified index
console.log('1. charAt(1):', str.charAt(1)); // Output: "e"

// 2. concat(string1, string2, ...): Combines two or more strings
const str2 = " from JavaScript!";
console.log('2. concat():', str.concat(str2)); // Output: "  Hello World  from JavaScript!"

// 3. includes(searchString, position): Checks if the string contains the specified substring
console.log('3. includes("World"):', str.includes("World")); // Output: true

// 4. indexOf(searchValue, fromIndex): Returns the index of the first occurrence of a specified value
console.log('4. indexOf("o"):', str.indexOf("o")); // Output: 4

// 5. lastIndexOf(searchValue, fromIndex): Returns the index of the last occurrence of a specified value
console.log('5. lastIndexOf("o"):', str.lastIndexOf("o")); // Output: 7

// 6. slice(start, end): Extracts a section of the string
console.log('6. slice(0, 5):', str.slice(0, 5)); // Output: "  Hel"

// 7. split(separator, limit): Splits the string into an array of substrings
console.log('7. split(" "):', str.split(" ")); // Output: ["", "", "Hello", "World", "", ""]

// 8. toLowerCase(): Converts the string to lowercase
console.log('8. toLowerCase():', str.toLowerCase()); // Output: "  hello world  "

// 9. toUpperCase(): Converts the string to uppercase
console.log('9. toUpperCase():', str.toUpperCase()); // Output: "  HELLO WORLD  "

// 10. trim(): Removes whitespace from both ends of the string
console.log('10. trim():', str.trim()); // Output: "Hello World"
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