Check three consecutive numbers - JavaScript
We are required to write a JavaScript function that takes in a Number, say n, and we are required to check whether there exist such three consecutive natural numbers (not decimal/floating point) whose sum equals to n.
If there exist such numbers, our function should return them, otherwise it should return false. Following is the code −
Example
const sum = 54;
const threeConsecutiveSum = sum => {
if(sum < 6 || sum % 3 !== 0){
return false;
}
// three numbers will be of the form:
// x + x + 1 + x + 2 = 3 * x + 3
const residue = sum - 3;
const num = residue / 3;
return [num, num+1, num+2];
};
console.log(threeConsecutiveSum(sum));Output
Following is the output in the console −
[ 17, 18, 19 ]
Published on 15-Sep-2020 11:59:47
