Initialization of array and its types with examples

Initialization of array and its types

The process of assigning the values to elements of an array is called an initialization of the array. It can be done by a various method which is explained briefly below with examples.

Element by element

In this case, each and every element of an array is assigned with a value individually.

E.g.  int a[3];
         a[0]=45;
         a[1]=7;
         a[2]=-4;

Declaration and initialization at the same time

The values are assigned to the array at the time of declaration. The values are assigned collectively within a single statement. The values are assigned by keeping them within curly braces{ } and are separated by commas (,).

E.g.

• int a[3]={45,7,-4};

          which gives: 

          a[0]=45          a[1]=7        a[2]=-4

• int a[3]={5};     

          which gives a[0]=5 and all the other elements will return a garbage value.

 
Initialization from the user

In this process, we assign different values to the element as per the choice of the user. A for loop is applied to individually call the elements of the array. The values are assigned as per the user and stored in respective subscripts. Then again a for loop is used and elements are displayed individually on the output screen.

Also, see Input and output of a one-dimensional array