Algorithm in Javascript that identifies the larger number that matches the given input

Question

Algorithm in Javascript that identifies the larger number that matches the given input

I recently encountered a logic problem that involved comparing an input variable with an array to find the smallest number in the array without using sorting. For example, I had an array like:

const arr = [20,25,13,10,3,5,9,22];

and an input value of:

var inputt = 3;

The task was to identify the smallest number in the array that is greater than the given input. In this case, the expected answer would be "5".

I experimented with looping through the array to find the smallest number but struggled to determine how to specifically find the smallest number in the array that is greater than the input.

var myarr = [5,3,9,10,7];
var smallest = arr[0];

for(var i=1; i<arr.length; i++){
    if(myarr[i] < smallest){
        smallest = myarr[i];   
    }
}

console.log(smallest);

javascript arrays logic

Answer 1

Answer №1

const numbers = [20,25,13,10,3,5,9,22];
const userInput = 3;
const result = Math.min(...numbers.filter(num => num > userInput));

console.log(result)

Remove any numbers that are lower than the user input, then determine the smallest among them.

Answer 2

const numbers = [20,25,13,10,3,5,9,22];
const userInput = 3;
const result = Math.min(...numbers.filter(num => num > userInput));

console.log(result)

Remove any numbers that are lower than the user input, then determine the smallest among them.

Answer 3

Answer №2

Give this a try and keep me posted on the outcome

let myArray = [5, 3, 9, 10, 7];
let smallestNum = myArray[0];

for(let i = 1; i < myArray.length; i++){
    if(myArray[i] < smallestNum){
        if(myArray[i] > userInput){
             smallestNum = myArray[i];  
        }
    }
}

console.log(smallestNum);

Answer 4

Give this a try and keep me posted on the outcome

let myArray = [5, 3, 9, 10, 7];
let smallestNum = myArray[0];

for(let i = 1; i < myArray.length; i++){
    if(myArray[i] < smallestNum){
        if(myArray[i] > userInput){
             smallestNum = myArray[i];  
        }
    }
}

console.log(smallestNum);

Answer 5

Answer №3

To find a matching number, try using the reduce method which will return undefined if no match is found.

const result = arr.reduce((accumulator, value) => (value > input && (accumulator === undefined || value < accumulator)) ? value : accumulator, undefined);

Answer 6

To find a matching number, try using the reduce method which will return undefined if no match is found.

const result = arr.reduce((accumulator, value) => (value > input && (accumulator === undefined || value < accumulator)) ? value : accumulator, undefined);

Algorithm in Javascript that identifies the larger number that matches the given input

Answer №1

Answer №2

Answer №3

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