![What is an array ?
✘ Array is a collection of similar data items are
stored under a common name.
✘ It is a continuous memory location.
✘ The lowest address corresponds to the first
element and largest address to the last element.
✘ Example:
a[3]={1,2,3}
3](https://image.slidesharecdn.com/new-200417062811/85/Array-in-c-programming-3-320.jpg)
![One Dimensional Array:
Syntax:
data_typevariable_name[dimensional/size of an array];
Example:
a[5]={1,2,3,4,5}
5
Name a[0] a[1] a[2] a[3] a[4]
Value 1 2 3 4 5
Address 1000 1001 1002 1003 1004](https://image.slidesharecdn.com/new-200417062811/85/Array-in-c-programming-5-320.jpg)
![1.Compile time initialization:
Initialization at the time of the declaration is known as compile time
initialization.
Syntax:
data_typevariable_name[dimensional/size of an array]={value1, value2,…value n};
Example:
• int a[5]={1,2,3,4,5};
• int b[]={1,2,3,4,5};
• char name[]={‘A’,’B’,’C’};
7](https://image.slidesharecdn.com/new-200417062811/85/Array-in-c-programming-7-320.jpg)
![2. Run time initialization:
When the array have large number of elements then the
array elements can be initialize at run time.
Syntax:
scanf(“format specifier”, &variablename[size] );
8](https://image.slidesharecdn.com/new-200417062811/85/Array-in-c-programming-8-320.jpg)
Array in c programming
- 3. What is an array ? ✘ Array is a collection of similar data items are stored under a common name. ✘ It is a continuous memory location. ✘ The lowest address corresponds to the first element and largest address to the last element. ✘ Example: a[3]={1,2,3} 3
- 4. Classification of arrays: Depending upon the number of subscripts used, arrays are classified into three types 1. One-dimensional array 2. Two- dimensional array 3. Multi – dimensional array 4
- 5. One Dimensional Array: Syntax: data_typevariable_name[dimensional/size of an array]; Example: a[5]={1,2,3,4,5} 5 Name a[0] a[1] a[2] a[3] a[4] Value 1 2 3 4 5 Address 1000 1001 1002 1003 1004
- 6. Initialization: An array can be initialized at I. compile time II. run time ✘ After declaration ,the array elements must be initialized otherwise they hold garbage value. 6
- 7. 1.Compile time initialization: Initialization at the time of the declaration is known as compile time initialization. Syntax: data_typevariable_name[dimensional/size of an array]={value1, value2,…value n}; Example: • int a[5]={1,2,3,4,5}; • int b[]={1,2,3,4,5}; • char name[]={‘A’,’B’,’C’}; 7
- 8. 2. Run time initialization: When the array have large number of elements then the array elements can be initialize at run time. Syntax: scanf(“format specifier”, &variablename[size] ); 8