Problem-4_Find_the_Maximum_Number.js

// Problem-4_Find_the_Maximum_Number with Solution, Explanation, Verification, and Execution:

// To find the maximum number in an array, we can implement the Solution like below:
// -------------------------------------------------------------------

function findMax(nums) {
    if (nums.length === 0) return null;
    return Math.max(...nums);
}
let nums = [5, 1, 9, 3];
console.log(findMax(nums));


// Explanation: 
// ---------------
// Normally, Math.max() takes numbers as arguments like Math.max(5, 1, 9, 3). But it doesn't work directly on arrays like Math.max([5, 1, 9, 3]). The spread operator (...) is useful here and it will convert the array ([5, 1, 9, 3]) into a sequence of number (5, 1, 9, 3). Now, if we put that sequence of number into a variable and call the function with the variable as argument, we will get our desired output as the maximum number of that array.

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

// function findMax(nums = [5, 1, 9, 3]) {
//     if (nums.length === 0) return null;
//     return Math.max(...nums);
// }
// let nums = [5, 1, 9, 3];
// console.log(findMax(nums));

// 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-4_Find_the_Maximum_Number.js'
// Output (In the directory in IDE environment with node.js installed): 9