how does integration testing work code example

Example 1: integration testing

Integration testing is done to test the
modules when integrated to verify that they
work as expected. to test the modules which are
working fine individually don't have
issues when they are integrated.

Example 2: Integration Testing

The purpose of integration testing 
is to confirm that different components 
of the application interact with each other.
Integration testing is considered complete, 
when actual results and expected results are same