# C# Find the addition of two integer numbers Example:

``````    Input:
First number: 10
Second number: 20

Output:
Addition of 10 and 20 is = 30``````

Program:

``````using System;
class AddTwoNumbers {
static void Main() {
try{
//declare two variables
int a = 0;
int b = 0;

//input numbers
Console.Write("Enter first number: ");
a = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter second number: ");
b = Convert.ToInt32(Console.ReadLine());

//calculating sum
int sum = a+b;

Console.WriteLine("Addition of " + a + " and " + b + " is = " + sum);
}
catch(Exception ex){
Console.WriteLine("Error: " + ex.ToString());
}
}
}``````

Output

``````Enter first number: 10
Enter second number: 20
Addition of 10 and 20 is = 30``````

Program:

``````using System;
class AddTwoNumbers {
//defining function
static int sumOfTwoNumber(int x, int y){
return x+y;
}
//main function
static void Main() {
try{
//declare two variables
int a = 0;
int b = 0;

//input numbers
Console.Write("Enter first number: ");
a = Convert.ToInt32(Console.ReadLine());
Console.Write("Enter second number: ");
b = Convert.ToInt32(Console.ReadLine());

//calculating sum by calling the function
int sum = sumOfTwoNumber(a,b);

Console.WriteLine("Addition of " + a + " and " + b + " is = " + sum);
}
catch(Exception ex){
Console.WriteLine("Error: " + ex.ToString());
}
}
}``````

Output

``````Enter first number: 10
Enter second number: 20
Addition of 10 and 20 is = 30``````

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