Linear search is also called as sequential search. Linear search is a method for finding a particular value in a list. In this searching technique you need to check every elements one by one until desired element found.

 
#include<stdio.h>
#include<conio.h>

void main()
{
int i,a[50],num,size;
clrscr();
printf("Enter Size of array: ");
scanf("%d",&size);
printf("Enter %d element in array: \n",size);
for(i=0;i<size;i++)
{
scanf("%d",&a[i]);
}
printf("Enter element for search: ");
scanf("%d",&num);
for(i=0;i<size;i++)
{
if(a[i]==num) // if element is found
{
printf("\n%d is present at %d position",num,i+1);
break;
}
}
if(i==size)
{
printf("\n %d is not found",num);
}
getch();
  }

 
Enter Size of array: 5
Enter 5 element in array
10
6
4
12
20
Enter element for search: 4
4 is present at 3 position