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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 ]
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