What is Array?

Array is collection of more than one element of same type at a same memory location.

Declaration Syntax:

Data Type arrayname[size];

Here, size represent number elements stored in Array. This size is maximum so, user can enter equal or less elements but nor more than elements.

rn[0]

rn[3]

rn[2]

rn[1]

All Elements store in sequence in memory. An each element contain position which always start from zero.

0 1 2 3

For Example , if we want to store 4 student roll no at a same location then array has been declared like this:

int rn[4];

Advantage:

Variable cannot store more than one data at a time. Array removes this limit of variable.

Disadvantage:

Array can store an elements of same type only.

To enter data in given an array:

for(i=0;i<n;i++)

{

Scanf (“%d”,a[i]);

}

To display data in given an array:

For (i=0;i<n;i++)

{

Printf (“%d”,a[i]);

}

We can find maximum element , minimum element , sort the array , search an element from an Array.

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