Question

2. Trace through the following loop and show the values for A, B & C.

Answer 1

At the beginning, we have

A = 4, B = 3, C = 0

Although you didn't specify the programming language, usually 0 means false, so we never enter the first loop, because "while C" is never true.

We enter the second loop because B is different from A, so we decrease C by 1, and we have

A = 4, B = 3, C = -1

and we assign B = B-C, so now B becomes 3-(-1)=3+1=4. Now B=A and we exit the second loop, and we have

A = 4, B = 4, C = -1