We are required to write a JavaScript function that takes in an array of Numbers as the first argument and a single number as the second argument.
The function should find and return that number from the array which is closest to the number specified by the second argument.
For example −
const arr = [34, 67, 31, 53, 89, 12, 4]; const num = 41;
Then the output should be 34.
Example
Following is the code −
const arr = [34, 67, 31, 53, 89, 12, 4]; const num = 41; const findClosest = (arr = [], num) => { let curr = arr[0]; let diff = Math.abs (num - curr); for (let val = 0; val < arr.length; val++) { let newdiff = Math.abs (num - arr[val]); if (newdiff < diff) { diff = newdiff; curr = arr[val]; }; }; return curr; }; console.log(findClosest(arr, num));
Output
Following is the output on console −
34