First Program in C

July 20, 2019

First Program In C

C is simple and easy programming language. It is easy to learn. Here, we will discuss how to make a simple and first program using the C programming language. We need a Text Editor like Notepad, Notepad++ or an IDE like Turbo C for writing C program.

How to make a program :-

First we open a text editor and write the code.
After writing code then save your program with .c extension.
After save code we need to compile the code using alt+f9.
After compilation, finally run the whole code using ctrl+f9.

Structure of C program:-

First C program-

#include<stdio.h>
int main()
{
    printf(“Hello world”);
    return 0;
}

Output-

Hello world

Explanation

In the first line of a program we include stdio.h header file in program. stdio.h header file for standard input output.this is used for handle input output of a program.
The curly braces({}) is used for showing the beginning and ending of the Main Function,one braces for beginning and one for ending. It is used to set of all commands together.
main function is defined using the int return type. This is a standard. We can pass arguments in the main function, which is known as command line arguments. Main function is the starting point in every system.every C program requires a main function, without main function we cannot compile and execute a program.
printf() is used for displaying the output on screen.it is also print the character, str ing, float value, integer value on the screen, which is written in inverted commas (“ “). %d is used for print the integer value, %f is used for print the float value, %c is used for character value.