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Login NowAn array is a group of related data items that share a common name. In the other words, **an array is a data structure that stores a number of data items as a single entity (object)**.

The benefit of using arrays are given below

- In array, We can access the data very easily using index number
- We can apply searching process in array easily
- We can represent 2D arrays as matrices
- We can used to implement other data structure like linked lists, stack, queue, trees, graph etc.

The compare one dimensional array with two dimensional array is given below

Basis |
One Dimension Array |
Two Dimension Array |

Definition |
Store a single list of the element of a similar data type. | Store a ‘list of lists’ of the element of a similar data type. |

Representation |
Represent multiple data items as a list. | Represent multiple data items as a table consisting of rows and columns. |

Declaration |
datatype variable_name[row] |
datatype variable_name[row][column] |

Size |
size of(datatype of the variable of the array) * size of the array | size of(datatype of the variable of the array)* the number of rows* the number of columns. |

Example |
int arr[7]; | int arr[7][5]; |

**Program to Transpose of Matrix**

#include <stdio.h> int main() { int a[10][10], transpose[10][10], r, c; printf("Enter rows and columns: "); scanf("%d %d", &r, &c); // asssigning elements to the matrix printf("\nEnter matrix elements:\n"); for (int i = 0; i < r; ++i) for (int j = 0; j < c; ++j) { printf("Enter element a%d%d: ", i + 1, j + 1); scanf("%d", &a[i][j]); } // printing the matrix a[][] printf("\nEntered matrix: \n"); for (int i = 0; i < r; ++i) for (int j = 0; j < c; ++j) { printf("%d ", a[i][j]); if (j == c - 1) printf("\n"); } // computing the transpose for (int i = 0; i < r; ++i) for (int j = 0; j < c; ++j) { transpose[j][i] = a[i][j]; } // printing the transpose printf("\nTranspose of the matrix:\n"); for (int i = 0; i < c; ++i) for (int j = 0; j < r; ++j) { printf("%d ", transpose[i][j]); if (j == r - 1) printf("\n"); } return 0; }

The output of above program is

Enter rows and columns: 3 3 Enter matrix elements: Enter element a11: 1 Enter element a12: 2 Enter element a13: 3 Enter element a21: 4 Enter element a22: 5 Enter element a23: 6 Enter element a31: 7 Enter element a32: 8 Enter element a33: 9 Entered matrix: 1 2 3 4 5 6 7 8 9 Transpose of the matrix: 1 4 7 2 5 8 3 6 9

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