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Write a javascript program to print the first occurrence of the I character in the Hello World string without using loops

Write a javascript program to print the first occurrence of the I character in the Hello World string without using loops

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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**Problem Statement:** Write a JavaScript program to print the first occurrence of the "l" character in the "Hello World" string without using loops. **Solution Explanation:** To solve this problem without using loops, you can take advantage of JavaScript's `indexOf` method. This method returns the first index at which a specified character is found in a string, or -1 if the character is not found. **Sample Solution in JavaScript:** ```javascript let str = "Hello World"; let index = str.indexOf("l"); if (index !== -1) { console.log("The first occurrence of 'l' is at index:", index); } else { console.log("'l' not found in the string."); } ``` **Explanation of the Code:** - **Variable Declaration:** A variable `str` holding the string "Hello World" is declared. - **Finding the Index:** The `indexOf` method is used on the string `str` to find the first occurrence of the character "l". - **Conditional Check:** An `if` statement checks if the index is not -1, which means the character is found. If found, it prints the index. Otherwise, it indicates that "l" is not present. This approach directly finds the first occurrence efficiently without any explicit looping constructs.
Transcribed Image Text:**Problem Statement:** Write a JavaScript program to print the first occurrence of the "l" character in the "Hello World" string without using loops. **Solution Explanation:** To solve this problem without using loops, you can take advantage of JavaScript's `indexOf` method. This method returns the first index at which a specified character is found in a string, or -1 if the character is not found. **Sample Solution in JavaScript:** ```javascript let str = "Hello World"; let index = str.indexOf("l"); if (index !== -1) { console.log("The first occurrence of 'l' is at index:", index); } else { console.log("'l' not found in the string."); } ``` **Explanation of the Code:** - **Variable Declaration:** A variable `str` holding the string "Hello World" is declared. - **Finding the Index:** The `indexOf` method is used on the string `str` to find the first occurrence of the character "l". - **Conditional Check:** An `if` statement checks if the index is not -1, which means the character is found. If found, it prints the index. Otherwise, it indicates that "l" is not present. This approach directly finds the first occurrence efficiently without any explicit looping constructs.
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