# C Multidimensional Arrays

In this tutorial, you will learn to function with multidimensional arrays (two-dimensional and three-dimensional array) with the help of an example.

In C programming, you can create an array of arrays. These arrays are known as multidimensional arrays. For example,

`float x[3][4];`

Here, x is a two-dimensional (2d) array. The carry can hold 12 elements. You can think the array as a table with 3 lines and each line has 4 segments.

Similarly, you can declare a three-dimensional (3d) array. For example,

`float y[2][4][3];`

Here, the array y can hold 24 elements.

Contents

## Initializing a multidimensional array

Here is how you can initialize two-dimensional and three-dimensional arrays:

## Initialization of a 2d array

```// Different ways to initialize two-dimensional array

int c[2][3] = {{1, 3, 0}, {-1, 5, 9}};

int c[][3] = {{1, 3, 0}, {-1, 5, 9}};

int c[2][3] = {1, 3, 0, -1, 5, 9};```

## Initialization of a 3d array

You can initialize a three-dimensional cluster along these lines like a two-dimensional exhibit. Here’s an example,

```int test[2][3][4] = {
{{3, 4, 2, 3}, {0, -3, 9, 11}, {23, 12, 23, 2}},
{{13, 4, 56, 3}, {5, 9, 3, 5}, {3, 1, 4, 9}}};```

## Example 1: Two-dimensional array to store and print values

```// C program to store temperature of two cities of a week and display it.
#include <stdio.h>
const int CITY = 2;
const int WEEK = 7;
int main()
{
int temperature[CITY][WEEK];

// Using nested loop to store values in a 2d array
for (int i = 0; i < CITY; ++i)
{
for (int j = 0; j < WEEK; ++j)
{
printf("City %d, Day %d: ", i + 1, j + 1);
scanf("%d", &temperature[i][j]);
}
}
printf("\nDisplaying values: \n\n");

// Using nested loop to display vlues of a 2d array
for (int i = 0; i < CITY; ++i)
{
for (int j = 0; j < WEEK; ++j)
{
printf("City %d, Day %d = %d\n", i + 1, j + 1, temperature[i][j]);
}
}
return 0;
}```

Output

```City 1, Day 1: 33
City 1, Day 2: 34
City 1, Day 3: 35
City 1, Day 4: 33
City 1, Day 5: 32
City 1, Day 6: 31
City 1, Day 7: 30
City 2, Day 1: 23
City 2, Day 2: 22
City 2, Day 3: 21
City 2, Day 4: 24
City 2, Day 5: 22
City 2, Day 6: 25
City 2, Day 7: 26

Displaying values:

City 1, Day 1 = 33
City 1, Day 2 = 34
City 1, Day 3 = 35
City 1, Day 4 = 33
City 1, Day 5 = 32
City 1, Day 6 = 31
City 1, Day 7 = 30
City 2, Day 1 = 23
City 2, Day 2 = 22
City 2, Day 3 = 21
City 2, Day 4 = 24
City 2, Day 5 = 22
City 2, Day 6 = 25
City 2, Day 7 = 26```

## Example 2: Sum of two matrices

```// C program to find the sum of two matrices of order 2*2

#include <stdio.h>
int main()
{
float a[2][2], b[2][2], result[2][2];

// Taking input using nested for loop
printf("Enter elements of 1st matrix\n");
for (int i = 0; i < 2; ++i)
for (int j = 0; j < 2; ++j)
{
printf("Enter a%d%d: ", i + 1, j + 1);
scanf("%f", &a[i][j]);
}

// Taking input using nested for loop
printf("Enter elements of 2nd matrix\n");
for (int i = 0; i < 2; ++i)
for (int j = 0; j < 2; ++j)
{
printf("Enter b%d%d: ", i + 1, j + 1);
scanf("%f", &b[i][j]);
}

// adding corresponding elements of two arrays
for (int i = 0; i < 2; ++i)
for (int j = 0; j < 2; ++j)
{
result[i][j] = a[i][j] + b[i][j];
}

// Displaying the sum
printf("\nSum Of Matrix:");

for (int i = 0; i < 2; ++i)
for (int j = 0; j < 2; ++j)
{
printf("%.1f\t", result[i][j]);

if (j == 1)
printf("\n");
}
return 0;
}```

Output

```Enter elements of 1st matrix
Enter a11: 2;
Enter a12: 0.5;
Enter a21: -1.1;
Enter a22: 2;
Enter elements of 2nd matrix
Enter b11: 0.2;
Enter b12: 0;
Enter b21: 0.23;
Enter b22: 23;

Sum Of Matrix:
2.2     0.5
-0.9    25.0```

## Example 3: Three-dimensional array

```// C Program to store and print 12 values entered by the user

#include <stdio.h>
int main()
{
int test[2][3][2];

printf("Enter 12 values: \n");

for (int i = 0; i < 2; ++i)
{
for (int j = 0; j < 3; ++j)
{
for (int k = 0; k < 2; ++k)
{
scanf("%d", &test[i][j][k]);
}
}
}

// Printing values with proper index.

printf("\nDisplaying values:\n");
for (int i = 0; i < 2; ++i)
{
for (int j = 0; j < 3; ++j)
{
for (int k = 0; k < 2; ++k)
{
printf("test[%d][%d][%d] = %d\n", i, j, k, test[i][j][k]);
}
}
}

return 0;
}```

Output

```Enter 12 values:
1
2
3
4
5
6
7
8
9
10
11
12

Displaying Values:
test[0][0][0] = 1
test[0][0][1] = 2
test[0][1][0] = 3
test[0][1][1] = 4
test[0][2][0] = 5
test[0][2][1] = 6
test[1][0][0] = 7
test[1][0][1] = 8
test[1][1][0] = 9
test[1][1][1] = 10
test[1][2][0] = 11
test[1][2][1] = 12```

Please feel free to give your comment if you face any difficulty here.