Explain the format of C language

C programming is a general-purpose, procedural, and imperative computer programming language. In C language, we see that the

• statement ends with a semicolon.
• C case sensitive
• Indentation is ignored by the compiler.
• Strings are placed in double quotes.
• Library functions are in lowercase.
• Line breaks are processed by

>

Format of C language

The format of C programming language is explained as follows-

Semicolon

Semicolon is very important in C language.

It tells the compiler where one statement ends and the next statement begins.

If we fail to place a semicolon after each statement, you will receive a compilation error.

Case Sensitive

C is a case-sensitive language. Although int compiles, "Int", "INT" or any other variant does not work in C.

All C keywords are lowercase.

Comments are not required

Although comments are not important, it is a good practice to add comments at the beginning of a program that indicate the purpose of the program, such as the author and the person who wrote it date.

Sample program

The following is a C program that uses the C format method to calculate the circumference of a circle -

The formula for the circumference of a circle = 2*PI*R. p>

Among them, R is the radius of the circle, PI is a constant, and the value is PI3.415.

Example

#include<stdio.h> //library function are lower case
#include<conio.h>
#define PI 3.1415
main ( ){
   float c, r; //statements are terminated with semicolon
   printf ("enter radius of circle"); //strings are placed in double
   quotes
   scanf ("%f", &r);
   c = 2 * PI * r;
   printf ("Circumference = %f", c);
   getch ( );
}

Output

When the above program is executed, the following results are produced -

Enter radius of circle 1
Circumference=6.2830

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