Loop testing a white box testing technique performed to validate the loops. There are four kinds of loops as mentioned below:
Simple Loops
Nested Loops
Concatenated Loops
Unstructured Loops
Loops Testing reveals loops initialization problems.
By going through the loop once, the uninitialized variables in the loop can be determined.
Testing can also fix loop repetition issues.
Loops can also reveal capacity/performance bottlenecks.