Odd Even Count

// Input: ARRAY, int, 
// To find last even and odd ocuurence, count all occurence
// [10,11,15,5,171,11,7,9,12]
// NUM=11;
// index even, index odd, count

function findOccurrence(arr, num){
    let count=0, odd=-1, even=-1;
    for(let i=arr.length-1; i>-1; i--){
        if(arr[i]===num){
            if(i%2==0){
                even=i;
                break;
            }
        }
    }
    
    for(let i=arr.length-1; i>-1; i--){
        if(arr[i]===num){
            if(i%2!=0){
                odd=i;
                break;
            }
        }
    }
    
    for(let i=arr.length-1; i>-1; i--){
        if(arr[i]===num){
            count++;
        }
    }
    
    console.log(`Even: ${even}`);
    console.log(`Odd: ${odd}`);
    console.log(`Count: ${count}`);
}

findOccurrence([10,11,15,5,11,11,7,9,12],11);