Lab4 - Calculate sum of integers from 1 to N (1+2+3+...+N) using loop (not recursive function)

void setup(){
  int numbers=10;
  println("N = "+numbers);
  sum_1_to_N(numbers);
}

void sum_1_to_N(int n){
  int sum=0;
  while(n>0){
   if(n>1){
    println(n+"+");
   }else{
     println("1 = ");
  }
  sum=sum+n;
  n--;
  }
  println(sum);
  println("Sum of 1 to N = "+sum);
}