1. To find the repeating elements in array and add them and replace it in position before the repeated element.
for e.g. input array A={1,2,3,3,4,5,6,6}
output array B={1,2,6,4,5,12}
2.To separate even and odd elements from an array and print new array with alternate even and odd element.
3.To print the below pattern
1
2 4
6 8 10
12 14 16 18
20 22 24 26 28
30 32 34 36 38 40
..........N
