sum of digits of a number in cpp code example
Example 1: c++ sum of all numbers up to a number
int sum(int n){
return (n * (n+1)) / 2;
}
int sum(int n){
int tempSum = 0;
for (int i = n; i > 0; i--){
tempSum += i;
}
return tempSum;
}
int sum(int n){
return n > 0 ? n + sum(n-1) : 0;
}
Example 2: c++ sum up numbers
int sum(int n){
return (n * (n+1)) / 2;
}
int sum(int n){
int tempSum = 0;
for (int i = n; i > 0; i--){
tempSum += i;
}
return tempSum;
}
int sum(int n){
return n > 0 ? n + sum(n-1) : 0;
}