Computer programs can contain integrated coding within other code and stacked upon even more code, creating very large programs. Computers can also perform millions of arithmetic calculations in an hour. How can one possibly know the results are correct or theoretically even check the results?

Explanation:

When a computers behavior meets its expectation is calculation is correct, you also have to understand the limitations of the computer and correctly identifying and understand its operating system.

You can also double check results for the calculations ensuring that inputs for both calculations are the same.

Console or log output.

Explanation:

Computer program are instructions computer follow to execute a task or compute a result. Programming languages are used to write these programs. The computer system can only understand machine codes which are stream of 1s and 0s, so the program for a programming language is compiled or interpreted to machine code.

The console is a terminal that displays the output. It is used in programming to output the printed value to a program statement.

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