CODEWITHSUNDEEP
javascriptmath
user2861858
user2861858

Reputation: 5

Check numbers are in range of each other

I am writing a javascript app and have 3 user selected numbers, Im stuck with a way of figuring out weather the numbers are all within plus and minus 5 of each other.

Upvotes: 0

Views: 106

Answers (2)

jasonscript
jasonscript

Reputation: 6170

Wasn't sure if the difference between the lowest and the highest number had to be within 5, or if all numbers had to be. Since @Banana-In-Black had one solution covered, I went the other way:

This makes sure that there isn't more than 5 between each number (not just lowest and highest)

var withinFive = function(num1, num2, num3) {
    var diff1 = Math.abs(num1 - num2);
    var diff2 = Math.abs(num2 - num3);

    return (diff1 <= 5 && diff2 <=5);
};

console.log(withinFive(1,2,7));

so in this example {1,2} is <= 5 and {2,7} <= 5 so the function returns true

Upvotes: 0

Banana-In-Black
Banana-In-Black

Reputation: 2557

function(num1, num2, num3) {
    var array = [num1, num2, num3];
    array.sort();
    return Math.abs(array[0] - array[array.length - 1]) <= 5;
}

[Edit*] Another improved version if i misunderstand ur purpose:

function calculate() {
    var array = new Array();
    for(var i = 0; i < arguments.length; i++) {
        // put every argument in a array
        array.push(arguments[i]);
    }
    // sorting in ascending order
    array.sort(function(a, b) { return a - b; });
    var interval = array.length - 1;
    // math part
    return Math.abs(array[0] - array[interval]) <= interval * 5;
}

ex: calculate(4, 15, 7); // you'll get false
    calculate(6, 10, 9, 16); // true

Upvotes: 2

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