Test case mostly used for 
Manual Testing where as Test Script
mostly used for Automation Testing
• A test case is a documentation which
specifies input values, expected output
and the preconditions for executing
the test. It's also a layout of the 
low-level details on how to test the scenario
• A test script in software testing is
a set of instructions that will be performed
on the system under test to test that the
system functions as expected.