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Author: dpvasani

Ch 4 String Practice Set.js

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+//                 Ch 4 String Practice Set
+
+// Q1)Write a program that counts the number of characters in a given string.
+
+
+
+// const str = "Hello, World!";
+// const count = str.length;
+// console.log(count); // Output: 13
+
+
+// Q2)Write a program that checks if a string contains a specific substring.
+
+
+
+// const str = "Hello, World!";
+// const substring = "World";
+// const containsSubstring = str.includes(substring);
+// console.log(containsSubstring); // Output: true
+
+
+
+// Q3)Write a program that converts a string to uppercase.
+
+
+
+// const str = "Hello, World!";
+// const uppercaseStr = str.toUpperCase();
+// console.log(uppercaseStr); // Output: HELLO, WORLD!
+
+
+
+// Q4)Write a program that extracts a portion of a string based on start and end indexes.
+
+
+
+// const str = "Hello, World!";
+// const extractedStr = str.slice(7, 12);
+// console.log(extractedStr); // Output: World
+
+
+// Q5)Write a program that replaces a specific substring with another substring.
+
+
+
+// const str = "Hello, John!";
+// const newStr = str.replace("John", "Alice");
+// console.log(newStr); // Output: Hello, Alice!
+
+
+
+// Q6)Write a program that splits a string into an array of substrings based on a delimiter.
+
+
+
+// const str = "Hello, World!";
+// const arr = str.split(",");
+// console.log(arr); // Output: ["Hello", " World!"]
+
+// Q7)Write a program that checks if a string starts with a specific character or substring.
+
+
+
+// const str = "Hello, World!";
+// const startsWithHello = str.startsWith("Hello");
+// console.log(startsWithHello); // Output: true
+
+
+// Q8)Write a program that checks if a string ends with a specific character or substring.
+
+
+
+// const str = "Hello, World!";
+// const endsWithWorld = str.endsWith("World!");
+// console.log(endsWithWorld); // Output: true
+
+
+// Q9)Write a program that trims whitespace from the beginning and end of a string.
+
+
+
+// const str = "   Hello, World!   ";
+// const trimmedStr = str.trim();
+// console.log(trimmedStr); // Output: Hello, World!
+
+
+// Q10)Write a program that checks if a string is empty.
+
+
+
+// const str = "";
+// const isEmpty = str.length === 0;
+// console.log(isEmpty); // Output: true