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OperatorsCoding problems

Operators: coding problems

Write a program that reads the input and prints the answer. Run checks it against every test, including hidden ones.

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A cashier wants a quick check digit. For a receipt number, add up all of its decimal digits. The number can be as large as a long, so an int is not enough.
**Constraints:** 0 <= n <= 10^18.
Use % to read the last digit and / to drop it.
Input. One integer n.
Output. One integer: the sum of the decimal digits of n.
Example 1 input
```
4825
```
Output
```
19
```
Example 2 input
```
1000000000000000000
```
Output
```
1
```
LanguageGo
package main import ( "bufio" "fmt" "os" ) func main() { reader := bufio.NewReader(os.Stdin) var n int64 fmt.Fscan(reader, &n) // your code here }