AMSTRAD CPC464 User Manual page 21

Notice how the letter E is still visible within the cursor. Press the [CLR] key once and you will see
that the letter E has been cleared and the letters F G H have each moved one space to the left with
the letter F now appearing within the cursor.
Now press the [CLR] key again and hold it down. You will see how the letter F is cleared followed by
the letter G and H.
[ESC]
This key is used to [ESC]ape from a function that the computer is in the process of carrying out.
Pressing the [ESC] key once will cause the computer to temporarily pause in its function, and will
continue again if any other key is pressed.
Pressing the [ESC] key twice will cause the computer to completely [ESC]ape from the function
which it is carrying out. The computer is then ready for you to type in some more instructions.
Now press the [ESC] key twice..
IMPORTANT
When you reach the right hand edge of the display by entering more than 40 characters on the
screen, the next character will automatically appear on the next line at the left edge of the screen.
This means that you should NOT press [ENTER] as those of you accustomed to typewriters might
press a carriage return towards the right edge of a page.
The computer does this automatically for you, and will react to an unwanted [ENTER] by printing
an error message - usually a Sy n t a x e r r o r , either there and then, or when the program is run.
Syntax Error
If the message: Syntax error appears on the screen, the computer is telling you that it does not
understand an instruction that you have entered. For example type in:
printt [ENTER]
On the screen you will see the message:
Syntax error
The message appears because the computer has not understood the instruction
printt
If you type a mistake in the line of a program, such as:
1 0 p r i n t t " a b c " [ENTER]
The Syntax error message will not appear until the instruction is processed by the computer when
the program is run.