Reads the value of the start button. The start button is a digital sensor that returns 1 when being pressed and 0 when not being pressed.

Syntax

1. start_button();

Example

1. /*Wait until the start button is pressed.
2. Then, move forward until the sonar sensor detects is close to the wall.*/
3. void main()
4. {
1. printf("\nPress start to begin.");
3. while(start_button()!=1)
1. sleep(0.5);
4. motor(2,95);
5. motor(4,95);
6. while(sonar()>500)
1. sleep(0.5);
7. ao();
5. }