Problem-1_Reverse_a_String.js

// Problem-1_Reverse_a_String with Solution, Explanation, Verification, and Execution:

// To reverse a string, we can implement the Solution like below:
// -------------------------------------------------------------------

function reverseString(input) {
    let reversed = '';
    for (let i = input.length - 1; i >= 0; i--) {
        reversed += input[i];
    }
    return reversed;
}

// Explanation: 
// ---------------
// This function initializes an empty string to store the result. It then iterates backward through the input string using a for loop, starting from the last character (accessed via index input.length - 1) and decrementing the index until reaching the first character. Each character is appended to the result string. This approach builds the reversed string manually without using array methods, ensuring a straightforward and controlled reversal.

// Verification:
// ----------------

// function reverseString(hello) {
//     let reversed = '';
//     for (let i = hello.length - 1; i >= 0; i--) {
//         reversed += hello[i];
//     }
//     return reversed;
// }
// console.log(reverseString("hello"));

// Execution of the above code block in IDE environment with node.js installed:
// ----------------------------------------------------------------------
// Input (In the directory in IDE environment with node.js installed): 'node Problem-1_Reverse_a_String.js'
// Output (In the directory in IDE environment with node.js installed): 'olleh'