In the previous lecture we have learnt about decrementing pointer variable. In this chapter we will be learning about adding integer number to pointer variable.

## Adding integer value with Pointer

In C Programming we can add any integer number to Pointer variable. It is perfectly legal in c programming to add integer to pointer variable.
In order to compute the final value we need to use following formulae :

```final value = (address) + (number * size of data type)
```

Consider the following example –

```int *ptr , n;
ptr = &n ;
ptr = ptr + 3;```

## Live Example 1 : Increment Integer Pointer

```#include<stdio.h>

int main(){

int *ptr=(int *)1000;

ptr=ptr+3;
printf("New Value of ptr : %u",ptr);

return 0;
}```

## Output :

`New Value of ptr : 1006`

## Explanation of Program :

In the above program –

```int *ptr=(int *)1000;
```

this line will store 1000 in the pointer variable considering 1000 is memory location for any of the integer variable.

## Formula :

```ptr = ptr   + 3 * (sizeof(integer))
= 1000  + 3 * (2)
= 1000  + 6
= 1006
```

Similarly if we have written above statement like this –

```float *ptr=(float *)1000;
```

then result may be

```ptr = ptr   + 3 * (sizeof(float))
= 1000  + 3 * (4)
= 1000  + 12
= 1012
```

In the next chapter we will be subtracting the integer number from the pointer variable.