# How do you sum a number in C++?

**To get sum of each digit by C++ program, use the following algorithm:**

- Step 1: Get
**number**by user. - Step 2: Get the modulus/remainder of the
**number**. - Step 3:
**sum**the remainder of the**number**. - Step 4: Divide the
**number**by 10. - Step 5: Repeat the step 2 while
**number**is greater than 0.

Herein, how do you sum a number in C++?

**C++ Program to Display the Sum of the Digits of a given Number**

- * C++ program to Display the Sum of the digits of a given Number.
- #include<iostream>
- using namespace std;
- int val, num, sum = 0;
- cout << "Enter the number : ";
- cin >> val;
- num = val;
- while (num != 0)

Likewise, how do you sum a number in a for loop? **Getting the sum using a for loop implies that you should:**

- Create an array of numbers, in the example int values.
- Create a for statement, with an int variable from 0 up to the length of the array, incremented by one each time in the loop.
- In the for statement add each of the array's elements to an int sum.

Beside above, how do you find the digit sum of a number?

The **digit sum of a number**, say 152, is just the **sum** of the **digits**, 1+5+2=8. If the **sum** of the **digits** is greater than nine then the process is repeated. For example, the **sum** of the **digits** for 786 is 7+8+6=21 and the **sum** of the **digits** for 21 is 3 so the **digit sum** of 786 is 3.

What does += mean in C++?

**+=** Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand. C **+=** A **is** equivalent to C = C + A. -= Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand.