clrscr() function in C

clrscr() is used for clearing output screen i.e. console.It is not compulsory to use in c program, but it will helpful to remove and clear unnecessary output of previous programs.

Suppose you run the program terminate the program and once again you run the program then the output of the previous program is there if you not use clrscr(). So when ever you use the clrscr(); it clear the screen. and it always declare after the variable declare.

For Example:
                               int a, b, c;
                               char ch;
                               clrscr();

Example of clrscr() function in C Programming

#include<stdio.h>

void main()
{
int i;

clrscr(); //this function clear the previous
                   //program output screen.

for(i=0;i<5;i++)
{

printf("clrscr() function test\n");

}
printf("press any key to clear screen\n");
getch();

clrscr();
printf("The screen has been cleared ! ");
getch();
}