# Add Two no in C++ program

Numbers and their operations play a crucial role in programming languages. They are the building blocks for mathematical calculations and decision-making in algorithms. Operations such as addition, subtraction, multiplication, division, and modulo are used to perform arithmetic calculations and produce results. In addition, comparison operators (e.g. equal to, greater than, less than) are used to compare numerical values and make decisions in control structures (e.g. if-else statements).

Numbers can also be used to represent quantities, such as the size of arrays, the count of iterations in loops, and the duration of time in a program. Different programming languages have different numeric data types (e.g. integer, floating point, complex) to represent numbers and support various levels of precision.

In summary, numbers and their operations are the foundation for a wide range of computing tasks, from simple arithmetic calculations to complex algorithms that make decisions, process data, and control the flow of a program.

How to Add Two numbers in a C++ program

In C++, adding two numbers is a straightforward process. The addition operator '+' is used to perform the addition of two numbers. For example, to add two numbers a and b, the expression a + b is used. The result of the expression is the sum of the two numbers.

The addition operator works by adding the values of the two operands. For example, if a = 5 and b = 7, then a + b = 5 + 7 = 12. The result of the expression is stored in a variable or used as part of a larger expression. In addition to the addition operator, a function or a template function can also be used to perform the addition of two numbers in C++. The function or template function takes two arguments as input, performs the addition operation, and returns the result to the calling function. The result can then be stored in a variable or used as part of a larger expression.

In summary, the process of adding two numbers in C++ is performed using the addition operator '+' or a function/template function that performs the addition operation and returns the result to the calling function.

1. Using the '+' Addition Operator:

C++ Code

Output

```Enter two numbers: 10 20
Sum: 30
```

Explanation:

In this example, the addition operator '+' is used to add two numbers entered by the user and store the result in the 'sum' variable. The result is then displayed to the user. In this program, the user is prompted to enter two numbers, 10 and 20 in this example. The numbers are added using the addition operator '+' and the result, 30, is displayed to the user.

2. Using a Function:

C++ Code

Output

```Enter two numbers: 10 20
Sum: 30
```

Explanation:

In this program, the user is prompted to enter two numbers, 10 and 20 in this example. The numbers are added using the 'add' function and the result, 30, is displayed to the user.

3. Using a Template Function:

C++ Code

Output

```Enter two numbers: 10 20
Sum: 30
```

Explanation:

In this program, the user is prompted to enter two numbers, 10 and 20 in this example. The numbers are added using the 'add' template function and the result, 30, is displayed to the user. The template function allows the addition of numbers of any data type, but in this example, it is being used to add two integer values.