Radio Buttons hold a boolean value of either true or false. Normally, Radio Buttons are placed in groups. Radio Buttons are used when there is a setting that needs options that are mutually exclusive. If a single setting is independent, then a CheckBox should be used.

RadioButtons hold a boolean value in the Radio Button’s Checked property.

Example
RadioButton1.Checked := True
RadioButton1.Checked := False

Simple Calculator Tutorials

Tutorial 5 - Setting up the Form - Simple Calculator Part 1

Tutorial 6 - String Conversion - Simple Calculator Part 2

Tutorial 7 - RadioButtons - Simple Calculator Part 3

Tutorial 8 - Try Except Error Handling - Simple Calculator Part 4

Tutorial 9 - Tabs and Finished App - Simple Calculator Part 5

Code Download
SimpleCalculator.zip