How to display previous value of a given value from an array in javascript


This Content is from Stack Overflow. Question asked by Amir Bhutta

How we can display the previous value of given value while value is given from an array and we should display the previous value of it

var theArray = [1,2,3,4,5,6,7,8,9,14,15];
const findValue = (arr, input) => {
  // to do 
findValue(theArray , 15)

When we give 15 in input then output would be 14


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