# Buttons

This topic describes the roles of some of the program buttons.

Evaluate

Clicking the Evaluate button:

- Computes the results based on the contents of the inputs, i.e., yellow edit boxes, up-down controls and radio buttons.

- Fills the white text boxes with the computed results.

Note that this also happens when you:

- Type a new value in an edit box and exit the box by clicking another control.

- Click an up-down control.

- Click a radio button.

Help

Clicking the Help button opens this Help (what a surprise!).

Close

Clicking the Close button terminates the program execution.

Read Note

Clicking the Read Note displays brief information about how the values in the bottom tabbed container were obtained.