a program in programming language  to achieve basic arithmetic operations on any two numbers of various data types.

Explanation:
The program begins by including the required stdio.h header file.
The main function declares two variables n and n2 to store integers and doubles entered by the user.
The user is prompted to enter an any integer number, which is then stored in the variable n using scanf.
Similarly, the user is prompted to enter a double number, which is stored in the variable n2 using scanf.
The program then performs arithmetic operations on the two numbers (addition res=n+n2, subtraction res=n2-n,
multiplication res=n*n2, division res=n2/n;) and the results shown using printf.Finally, the program terminates by returning 0; statement


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4.Write a C program to demonstrate the declaration and initialization of variables of different data types.
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13.Write a program in C that asks the user to enter the marks obtained in three subjects. Read the marks using scan. Calculate the average marks and display the student details.

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