Add two numbers in Java

Step 1: Lets open a notepad and write the following code.

//Code

class demo
{
    public static void main(String arg[])
    {
        int a = 10, b = 20, c = 0;
        c = a + b;
        System.out.println("sum of two no is :" + c);
    }
}

Step 2: Name it as "ab.java" and save the file on any location. I saved at "C:\app".

Step 3: Open command prompt (Press window + R and write cmd and hit OK).



Step 4: Go to "C:\app" by using command propmpt



Step 5: Now write the following code for checking my java file is compiling or not.

javac ab.java



My java program compiled successfully.

Step 6: Write the following code in command prompt. Press enter and see the output.

java demo

// demo is a class name which is written in my ab.java file.

Output



Happy Coding.