Answer the following questions :
1. What is the purpose of PD command in LOGO ?
2. How can you make the turtle reapppear on the screen?
3. What is the use of PE command ?
4. What is the use of CT command ?
Answers
1.Basic LOGO Commands. Function: The forward command is used to move the turtle forward while drawing a line. Result: Draws a 45 steps long line in the forward direction. Function: The back command is used to move the turtle backward while drawing a line.
2.We can make the turtle reappear on the screen by giving ST command.
4.The ct command is useful in the following situations:
A user working off-site needs to communicate with a local system under strictly supervised conditions, and the local user does not want to disclose the workstation's phone number. Because the local system contacts the remote terminal, the remote user does not need to know the telephone number of the local system. Additionally, the local user issuing the ct command can monitor the work of the remote user.
The cost of the connection should be charged either to the local site or to a specific account on the calling workstation. If the remote user has the appropriate access permission and can make outgoing calls on the attached modem, that user can make the equivalent of a collect call. The remote user calls the specified local system, logs in, and issues the ct command with the telephone number of the remote terminal, but without the -h flag. The local system hangs up the initial link so that the remote terminal is free for an incoming call and then calls back the modem attached to the remote terminal.