def aVeryBigSum(ar): # Write your code here sum = 0

for i in ar:
    sum = sum + i 
return sum

In C++ code:

long aVeryBigSum(vector<long> ar) {
    
    long result{};
    
    for(auto val : ar)
        result += val;
    
    return result;
}

Java Code using recursion

public static long aVeryBigSum(List<Long> ar) {

// Write your code here
if(ar.size()>0){
            return ar.remove(0)+aVeryBigSum(ar);
}
else{
    return 0;
    }
    }

public static long aVeryBigSum(List ar) { // Write your code here

long result=0;

for(int i=0; i<ar.size();i++){

    result+=ar.get(i);

}
return result;
}