20. C Multidimensional arrays.md

C Multidimensional Arrays

Video Link: https://youtu.be/ATA6dYDz954
Tutorial Link: https://www.programiz.com/c-programming/c-multi-dimensional-arrays

Declaration multidimensional array

int arr[2][3];

Initialization of multidimensional array

int arr[2][3] = { {1, 3, 5}, {2, 4, 6} };

Access Array Elements

#include <stdio.h>

int main() {

  int arr[2][3] = { {1, 3, 5}, {2, 4, 6} };

  printf("%d\n", arr[0][0]);
  printf("%d", arr[1][2]);

  return 0;
}

Output

1
6

Change Array Indexes

#include <stdio.h>

int main() {

  int arr[2][3] = { {1, 3, 5}, {2, 4, 6} };

  arr[0][2] = 7;
  arr[1][1] = 8;

  printf("%d\n", arr[0][2]);
  printf("%d", arr[1][1]);

  return 0;
}

Output

7
8 

Multidimensional Array and for loop

#include <stdio.h>

int main() {

  int arr[2][3] = { {1, 3, 5}, {2, 4, 6} };

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

  return 0;
}

Output

1    3    5    
2    4    6

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Programiz Quiz

Q. Which value will we get when we print arr[1][4] from the following array?

int arr[1][4] = { {3, 6, 9, 12}, {2, 4, 6, 8} };

Options:

1. 82
2. 5
3. 0
4. Random Value

Answer: 4