Check out example codes for "for loop in assembly". It will help you in understanding the concepts better.
Code Example 1
xor cx,cx ; cx-register is the counter, set to 0 loop1 nop ; Whatever you wanna do goes here, should not change cx inc cx ; Increment cmp cx,3 ; Compare cx to the limit jle loop1 ; Loop while less or equal
Learn ReactJs, React Native from akashmittal.com