## C Program to Search an Element in an array using Pointers

### Description

```Get an element and find the location of element in array, print -1 if element is not found.
Input:
5
5 7 9 3 1
9
Output:
2
Input:
5
5 7 9 3 1
4
Output:
-1```

### Solution

```#include <stdio.h>

#include <stdlib.h>
int main(void)

{

int n,i,pos=-1,*a,element;

printf("Enter size of array:");
scanf("%d",&n);

a=calloc(sizeof(int),n);
printf("Enter %d Elements:",n);
for(i=0;i<n;i++)

{

scanf("%d",a+i);

}

printf("Enter a element to find:");
scanf("%d",&element);

for(i=0;i<n;i++)

{

if(*(a+i)==element)
{
pos=i;
break;
}
}

printf("%d is in %d",element,pos);
return 0;

}
```

### Explanation

```calloc() is predefined function allocates memory of specified bytes.
Number of bytes is specified as (4,n), it means n 4 bytes. Since we are using integers, specified as 4bytes.

*a denotes first four bytes,  *(a+1) denotes second four bytes, *(a+2) denotes third four bytes and so on.,

i is initialized to 0 and incremented by 1 at each iteration of both the for loops.

First for loop reads n input numbers from user and stores them in array a[] from location 0 to n-1

using Second for loop the element is searched in each location from 0 to  the location of element or location n-1.

if element is found in a location that location i is stored as pos and exit from the for loop using break statement.

if element is not found from 0 to n-1 location, pos remains -1.```

#### Author - Ramesh P Natarajan

Learner, Professor, Technology Trainer, Software Developer and Content Marketer, very much passionate in the field of Software Application Development, Machine Learning and Search Engine Optimization.

### Interesting Pattern Programs: for more Patterns

```Input:
5
Output:
*
**
***
****
*****
****
***
**
*Solution```
```Input:
5
Output:
*
***
*****
*******
*********
*******
*****
***
*Solution```
```Input:
5
Output:
*        *
**      **
***    ***
****  ****
**********Solution```
```Input:
5
Output:
*       *
**     **
***   ***
**** ****
*********Solution```
```Input:
5
Output:
*       *
**     **
***   ***
**** ****
*********
**** ****
***   ***
**     **
*       *Solution```
```Input:
5
Output:
*********
*******
*****
***
*
***
*****
*******
*********Solution```