Where are Arithmetic instructions accessed in FS100?

• A. In the INFORM LIST under the ARITH group; includes INC, DEC, SET, and CLEAR.
• B. In the INFORM LIST under the MATH group, but excludes INC and DEC.
• C. All Arithmetic instructions are accessed through the INFORM LIST under the ARITH group, including INC, DEC, SET, and CLEAR.
• D. In the RUN LIST under the ARITH group.

Answer: (C)

Arithmetic instructions in FS100 are organized in the INFORM LIST, specifically in the ARITH group. This is where you access the commands that perform numeric operations on memory or registers, such as INC to increment, DEC to decrement, SET to assign a value, and CLEAR to reset. The RUN LIST is for executing a program, not for selecting arithmetic operations, so that option isn’t correct. The MATH group isn’t the place for these instructions either. The choice that states all Arithmetic instructions are accessed through the INFORM LIST under the ARITH group, including INC, DEC, SET, and CLEAR, is the best answer because it identifies the exact, comprehensive location for these commands.