MID$

A string function which returns 'num' characters of the string starting from character 'start_posn'. If 'num' is not present or if there are insufficient characters in the string, then all the characters from 'start_posn' onwards are returned.

C$=MID$(A$,start_posn,num)
C$=MID$(A$,Z)

You can use this function to select any part of a string. For instance, if 

name$="BBCBASIC(Z80)"

then 

part$=MID$(name$,4,5)

would assign BASIC to 'part$'. If the last number is omitted or there are insufficient characters to the right of the specified position, MID$ returns with the right hand part of the string starting at the specified position. Thus,

part$=MID$(name$,9)

would assign (Z80) to 'part$'.

For example,

10 name$="BBCBASIC(Z80)"
20 FOR i=1 TO LEN(name$)
30   PRINT MID$(name$,i,10)
40 NEXT

would print 

BBCBASIC(Z
BCBASIC(Z8
CBASIC(Z80
BASIC(Z80)
ASIC(Z80)
SIC(Z80)
IC(Z80)
C(Z80)
(Z80)
Z80)
80)
0)
)

Syntax

<s-var>=MID$(<str>,<numeric>[,<numeric>])

Associated Keywords