# Input numbers in 2d array and find the sum of each column in C

###### Two Dimensional Array - Question 6

In this question, we will see how to input numbers in a 3X3 integer matrix (2d array) and find the sum of each column separately in C programming. To know more about two dimensional array click on the two dimensional array lesson.

**Q6)** Write a program in C to input numbers in a 3X3 integer matrix (2d array) and find the sum of each column separately.

#### Program

```
#include <stdio.h>
#include <conio.h>
int main()
{
int a[3][3], r,c,cs;
printf("Enter 9 numbers\n");
for(r=0; r<3; r++)
{
for(c=0; c<3; c++)
{
scanf("%d",&a[r][c]);
}
}
for(r=0; r<3; r++)
{
cs=0;
for(c=0; c<3; c++)
{
printf("%d ",a[r][c]);
cs=cs+a[c][r];
}
printf(" Column Sum = %d\n",cs);
}
return 0;
}
```

#### Output

Enter 9 numbers 18 12 72 10 15 45 38 5 64 18 12 72 Column Sum = 66 10 15 45 Column Sum = 32 38 5 64 Column Sum = 181