How can i separate number and add them?

pakpatel

If i have any number like : 1234 and i want to do 1+2+3+4 = 10 What should i do? and what method should i use ? -Thanks

Peter

Ian Uy

string number="1234"; int total=0; for(int i=0;i { total+=Int32.Parse(number); }

It is said that the most complex structures built by mankind are software systems. This is not generally appreciated because most people cannot see them. Maybe that's a good thing because if we saw them as buildings, we'd deem many of them unsafe.

pakpatel

Thanks i think this is really tricky..any other way you can solve this ?

Peter

Ian Uy

How is it "tricky"?

It is said that the most complex structures built by mankind are software systems. This is not generally appreciated because most people cannot see them. Maybe that's a good thing because if we saw them as buildings, we'd deem many of them unsafe.

talisker77

Here is a method that can work, should in theory also be able to add numbers in string with chars.

string s = "1234";
int total = 0;
foreach (char c in s)
{
    int x;
    int.TryParse(c.ToString(), out x);
    total += x;
}

elektrowolf

..and the shortest one: string s = "1234"; int total = s.ToCharArray().Sum((x) => int.Parse(x.ToString())); ;)

Roger Alsing 0

Naaah ;)

int total = s.ToCharArray().Sum((x) => ((int)x)-48);

(ok ok , it is more of a hack ;) )

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elektrowolf

But you can still leave out the brackets around x :P ;)

Alan N

You should use the modulus or remainder function and integer division to solve this problem. Using a divisor of 10 you extract one decimal digit at a time from the number. The same technique with a divisor of 16 can be used to extract hexdecimal digits.

  Int32 num = 123456789;
  Int32 sum = 0;
  Int32 temp = num;
  while (temp > 0) {  
    sum += temp % 10;    // sum remainders
    temp = temp / 10;    // integer division
  }
  Console.WriteLine("Sum of all digits in {0} is {1}", num, sum);

AlanN