What's wrong with my code ? JS

#1

Hello FCC campers, well i want to display sum of same numbers in the two arrays, some i did comparison then sum but my code won’t work !!

let arr1 = [2, 7, 5];
let arr2 = [3, 7, 5];
let totArr = 0;
/*function distinctElement(arr){}*/
  
for(let i = 0; i < arr1.length; i++){
  totArr = arr[i];
  for(let j=0; i < arr2.length; j++){
    if(arr1[i] == arr2[j]){
      totArr = arr[i] + arr[j];
    }
  }
}

console.log(totArr)
#2 
let arr1 = [2, 7, 5];
let arr2 = [3, 7, 5];
let totArr = 0; 
for(let i = 0; i < arr1.length; i++){
  for(let j=0; j < arr2.length; j++){
    if(arr1[i] == arr2[j]){
      totArr += arr1[i] + arr2[j];
    }
  }
}

console.log(totArr)
#3