Second Largest Element in an array

This is the given array

let arr=[1,2,4,7,7,5]

Declare the two variables

let firstMax;
let secondMax;

Then find out the which is greater in the first 2 index values

if(arr[0] > arr[1]){
  firstMax = arr[0]
}else{
  secondMax=arr[1]
}

if(arr[1] > arr[0]){
  firstMax = arr[1]
}else{
  secondMax=arr[0]
}

Then begin the loop from 2 to last index of the array

In the first loop

In the second loop

In the third loop

In the fourth loop

Complete solution to find the second largest in the array

let arr=[1,2,4,7,7,5]

let firstMax;
let secondMax;

if(arr[0] > arr[1]){
  firstMax = arr[0]
}else{
  secondMax=arr[1]
}

if(arr[1] > arr[0]){
  firstMax = arr[1]
}else{
  secondMax=arr[0]
}

for(let i=2;i<arr.length;i++){
  if(arr[i] > firstMax){
    secondMax=firstMax;
    firstMax=arr[i];
  }

  if(arr[i] > secondMax && arr[i] < firstMax){
    secondMax = arr[i]
  }

}

console.log("firstMax",firstMax)
console.log("secondMax",secondMax)