# Pointer-Arithmetic-in c .

In this session i have discussed pointer arithmetic in C .

Pointer can perform the arithmetic operation as below .

2-Subtraction .

3-Multiplication .

4-Division .

5-Increment .

6-Decrement .

7-Comparision .

We can perform the addition operation in pointer .

Example : Write a program that demonstrate the addition in pointer .

``` #includ<stdio.h> int main() { int *ptr1,*ptr2; int x,y,sum; x=20; y=10; sum=0; ptr1=&x; ptr2=&y; sum=*ptr1+*ptr2; printf("Sum : %d",sum); return 0; } ```
```    OUTPUT : Sum : 30
```

2-Subtraction

We can perform the subtraction operation in pointer .

Example : Write a program that demonstrate the addition in pointer .

``` #includ<stdio.h> int main() { int *ptr1,*ptr2; int x,y,sub; x=20; y=10; sub=0; ptr1=&x; ptr2=&y; sub=*ptr1-*ptr2; printf("Sub : %d",sub); return 0; } ```
```    OUTPUT : Sum : 10
```

3-Multiplication

We can perform the multiplication operation in pointer .

Example : Write a program that demonstrate the addition in pointer .

``` #includ<stdio.h> int main() { int *ptr1,*ptr2; int x,y,mul; x=20; y=10; mul=0; ptr1=&x; ptr2=&y; mul=*ptr1 * *ptr2; printf("Multi : %d",mul); return 0; } ```
```    OUTPUT : Sum : 200
```

4-Division

We can perform the division operation in pointer .

Example : Write a program that demonstrate the addition in pointer .

``` #includ<stdio.h> int main() { int *ptr1,*ptr2; int x,y,div; x=20; y=10; div=0; ptr1=&x; ptr2=&y; div=*ptr1 / *ptr2; printf("Div : %d",div); return 0; } ```
```    OUTPUT : Div : 2
```

5-Increment

We can perform the increment operation in pointer . When pointer will increment it will increase the 4 bytes of memory to next location . It is depends on 32 bit or 64 bit operating system .

Example : Write a program that demonstrate the increment in pointer .

``` #includ<stdio.h> int main() { int x; int*ptr; x=20; ptr=&x; ptr=ptr+1; printf("x address is : %u",&x); printf("after increment address is : %u",ptr); return 0; } ```
```    OUTPUT : x address is : 2686728
after increment address is : 2686732
```

6-Decrement

We can perform the decrement operation in pointer . When pointer will decrement it will decrease the 4 bytes of memory to before location . It is depends on 32 bit or 64 bit operating system .

Example : Write a program that demonstrate the decrement in pointer .

``` #includ<stdio.h> int main() { int x; int*ptr; x=20; ptr=&x; ptr=ptr-1; printf("x address is : %u",&x); printf("after decrement address is : %u",ptr); return 0; } ```
```    OUTPUT : x address is : 2686728
after decrement address is : 2686724
```

7-Comparision

We can perform the comparision operation in pointer . When pointer will decrement it will decrease the 4 bytes of memory to before location . It is depends on 32 bit or 64 bit operating system .

Example : Write a program that demonstrate the decrement in pointer .

``` #includ<stdio.h> int main() { int x; int*ptr; x=20; ptr=&x; if(*ptr==x) { printf("Same value"); } else { printf("not same value"); } return 0; } ```
`    OUTPUT : Same value    `

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