MID

MID$(x$, n, m)

Purpose This function returns a sub-string of m characters from x$, beginning with the nth character.
x$ - any string expression, variable or constant.
n - any numeric expression producing a result of between 1 to 255
m - any numeric expression producing a result of between 0 to 255.

Examples A$ = MID$("Welcome to TBASIC",4,7)

Comments: A$ should contain the string :"come to"

Basic to TBASIC Reference Manual

Purpose	This function returns a sub-string of m characters from x$, beginning with the nth character. x$ - any string expression, variable or constant. n - any numeric expression producing a result of between 1 to 255 m - any numeric expression producing a result of between 0 to 255.
Examples	A$ = MID$("Welcome to TBASIC",4,7)
Comments:	A$ should contain the string :"come to"