Apple II User Manual

                Inputs a single character from the keyboard.

                If data is at the keyboard, it is put in the

                variable specified in the GET statement.

                If no data is available, the BASIC program

                will continue execution.

                GET can only be used as an indirect

                command.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

LEFT$           LEFT$ (string expression, length)                       310 PRINT LEFT$(X$,I)

                Gives the leftmost I characters of the string

                expression X$.  If I<=0 or >255 an FC

                error occurs.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

LEN             LEN (string expression)                                 220 PRINT LEN(X$)

                Gives the length of the string expression X$

                in characters (bytes).  Non-printing charac-

                ters and blanks are counted as part of the

                length.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

MID$            MID$ [string expression, start [, length])              330 PRINT MID$(X$,I)

                MID$ called with two arguments returns

                characters from the string expression X$

                starting at character position I.  If

                I>LEN(X$), then MID$ returns a null

                (zero length) string.  If I<=0 or >255,

                an FC error occurs,

                MID$ called with three arguments returns                340 PRINT MID$(X$,

                a string expression composed of the                     I,J)

                characters of the string expression X$

                starting at the Ith character for J characters.

                If I>LEN(X$), MID$ returns a null string.

                If I or J <=0 or >255, an FC error occurs.

                If J specifies more characters than are left

                in the string, all characters from the Ith on

                are returned.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

RIGHT$          RIGHT$ (string expression, length)                      320 PRINT RIGHT$

                Gives the rightmost I characters of the                 (X$,I)

                string expression X$.  When I<=0 or

                >255 an FC error will occur.  If

                I>=LEN(X$) then RIGHT$ returns all

                of X$.

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

STR$            STR$ (expression)                                       290 PRINT STR$(X)

                Gives a string which is the character repre-

                sentation of the numeric expression X.

                For instance, STR$(3.1)="3.1."

STATEMENT       SYNTAX/FUNCTION                                         EXAMPLE

VAL             VAL (string expression)                                 280 PRINT VAL(X$)

                Returns the string expression X$ converted

                to a number.  For instance.

                VAL("3.1")=3.1.  If the first non-space

                character of the string is not a plus (+) or

                minus (-) sign; a digit or a decimal point (.)

                then zero will be returned.