what is constant?

 

What is Constant?

    Values which are stored by the variable is called "constant". Constant is a fixed value which can't be changed during the program execution. Without constant a program can't be succeeded.

Ex:- int a=10;

    In the above example "a" is called variable and "10" is called constant that means, integer datatype can hold one integer type of data  in a variable.

Example of different constant:

Sl No	Name of the Constant	Example
01.	Integer constant	120,5,45,69
02.	Float / real constant	125.36,58.98,63.96,25.00
03.	Character Constant	‘a’,’b’,’c’,
04.	String constant	“Ram”,”Krishna”,”Laxmi”
05.	Octal constant	21,42,32,26

Example on Integer Constant

#include<stdio.h>

#include<conio.h>

main( )

{

int a=10,b=20;

c=a+b;

printf("%d is the addition", c);

return 0;

}

Example on Float/real Constant

#include<stdio.h>

#include<conio.h>

main( )

{

int c=75,java=78,html=68,sm=0;

float per=0;

sm=c+java+html;

per=sm/3;

printf("%d is the secured mark", sm);

printf("%f is the percentage of  mark", per);

return 0;

}