4. Click the appropriate button to run the script. Any output appears in the Result field. If you prefer, you can assign the results to another field.
5. Both scripts use the numerical fields NF1, NF2, and NF3. The user can type numbers into the NF1 and NF2 fields, and the script subtracts the numbers (NF1-NF2) and displays the difference in the NF3 field. If the result is negative, the NF3 value is set to 0.