Arrays (Linear Data Structure)

Arrays (Linear Data Structure)

• The array is a data structure in C language.
• It can store a fixed-size.
• It can store value in sequential collection of elements.
• It has the same data type for all elements.
• Syntax:

Datatype Variable_name[];

• Example:

int age[10];

• Types of Array:
  

• An array can be One-Dimensional, Two-Dimensional and Multidimensional.
• One-Dimensional
• Syntax:

Datatype Variable_name[];

• Example:

char name[10];

• Two-Dimensional
  
• Syntax:

Datatype Variable_name[][];

• Example:

char names[10][10];

• Multidimensional
• Syntax:

Datatype Variable_name[][][];

• Example:

char names[10][10][10];

How to initialize arrays?

• One-Dimensional
• Syntax:

Datatype Variable_name[]={v1, v2, v3...};

• Example:

char name[10]={'s','r','t','h','a','k'};
Note: If char data types then each element enclosed with single quote.

• Two-Dimensional
• Syntax:

Datatype Variable_name[][]={{},{},{}...};

• Example:

char names[2][4]={{'a','b','c','d'},
      {'x','y','z'}};

How to display arrays elements?

• One-Dimensional:
• Syntax:

Variable_name[index];

• Example:

char name[10]={'s','r','t','h','a','k'};
printf("%c",name[2]);

int age[3]={10,20,30};
printf("%d",age[1]);

• Two-Dimensional:
  
• Syntax:

Variable_name[row_index][column_index];

• Example:

char names[2][4]={{'a','b','c','d'},
      {'x','y','z'}};

printf("%c",name[0][2]);
printf("%c",name[1][2]);