How do you swap positions of elements in an array?

 What is an array: Array is the collection of similar types of data items.

How do you swap positions of elements in an array

arr[]={1,3,2,5,6,7,8,9}; 
first of all, create a temp variable 
temp = arr[2]; 
arr[2]= arr[5]; 
arr[5] = temp; 
print arr[5];