print 10101 and 01010 series using for loop

[bsgcollege]

10101
01010
10101
01010
i want print above series using for loop.

[weaknessforcats]

Can you write a for loop that cycles 4 times?

If you look vertically you will see each columns changes from 1 to 0 or 0 to 1.

Define four bools.

Change the state of these bools on each cycle of the loop.

Post again after you have a little code.

[techboy]

I think he is need of pattern code i.e using only two for loops and which is the better approach.
Understand the pattern as a i*j matrix such that
when i = even print the even j values as '1' and
when j = odd print the odd j values as '1'
else where print '0'.