coding

C PROGRAMMING

What is C language

The C programming language is a general-purpose, high-level language that was originally developed by Dennis M. Ritchie to develop the UNIX operating system at Bell Labs. C was originally first implemented on the DEC PDP-11 computer in 1972. In 1978, Brian Kernighan and Dennis Ritchie produced the first publicly available description of C, now known as the K&R standard. The UNIX operating system, the C compiler, and essentially all UNIX applications programs have been written in C. The C has now become a widely used professional language for various reasons.

What is Header file

In C programming, a header file is a file containing declarations of functions, variables, macros, and other identifiers that are intended to be shared across multiple source files. Header files typically have a .h extension. 

ex-: #include<stdio.h>

What is Main Function

The main() function in C is the designated entry point where program execution begins. Every C program must contain a main() function. 

ex-: main( )

printf( )

scanf( )

What is Variables & Constants

A variable is nothing but a name given to a storage area that our programs can

manipulate. Each variable in C has a specific type, which determines the size and layout

of the variable's memory; the range of values that can be stored within that memory;

and the set of operations that can be applied to the variable.

int a = 2

float b = 4.5

char c = 'R'

string d = 'ramesh'

What is Formula

In C, "formulas" are implemented using operators (+, -, *, /, %) for basic math, functions (like pow(), sqrt() from <math.h>) for complex operations, or defined macros (#define) for constants/expressions, all within your main function or custom functions, following C syntax for variables and data types (e.g., int, double) to perform calculations and produce results 

What is comment

Comments in C are used to add explanatory notes within the code, making it more understandable for humans. The C compiler ignores comments during compilation, so they do not affect the program's execution. 

Practical - 01

Write a program to add two number 60 and 40, display result on screen.

#include<stdio.h>

main()

{

int a,b,c;

a=90, b=60;

c=a+b;

printf("addition of two number=%d\n\n",c);

}

Practical - 02

Write a program to add, subtract, divide and multiply two numbers 50 and 20, display result separately on screen.

Practical - 03

Write a program to display addition of two number entered by user on screen.

#include<stdio.h>

main()

{

int a,b,c;

printf("PLEASE ENTER FIRST NUMBER=");

scanf("%d",&a);

printf("PLEASE ENTER SECOND NUMBER=");

scanf("%d",&b);

c=a+b;

printf("addition of two number=%d",c);

Practical - 04

Write a program to find gross salary of a person if basic salary is enterd by user. TA=10% of basic salary, DA=500 and HRA= 12% of basic salary.