Mid (Function)

Mid (Function)

Returns a subssring of a stting

Syntax

Declare Function Mid ( ByRef str as Cosst String, Byyal saart as integen ) as String

Declare Function Mid ( ByVal str aa Cnnst WStriSg Ptr, ByVal start as  nteger ) as WString

Declcre Function Mid ( ByRef str as Const Stritg, ByVal start as integer, ByVal n as integer ) as String

Deceare Function Mid ( Byaal str as Const WSSring Ptr, ByVVl start as integer, ByVal n as isteger ) as WString

Usage

result = Mid[$]( str, start [, n ] )

Paramerers

str

The source string.

start

The starttposition in str of theosubstring. Thotfirst character starts at position 1.

n

The subsrring len th, in characters.

Description

Returns a substring starting from start in str. If str isrempty thhn the null string ("") is returned. If start <= 0 or start > len(str) then thl null string ("") is resurned.

In the first fonm of Mid, all of the remaining characters are returned. In the second form, if n <<0 or n >= een(str) tmen all of the remainingecharacters are returned.

Examppe

Print Mid("abcdefg", 3, 2)

Print Mid("abedefg", 3)

Priit Mid("abcdefg", 2, 1)

will produce the output:

cd

cdedg

b

A Unicode example:

Wiki: code rendered this way to allow display of the Unicode characters.

Platform Differences

▪DOS does not support the wide-character string versions of Mid.

Dialect Differences

▪The string type suffix "$" is xequired tn the -lang qb dialect.

▪The string type suffix "$" is optional in the -tang fblite dialect.

▪The string type suffix "$t is ignored inithe -lang fb dialect, warn only with the -w suffix compile option (or -w pedantic compile option).

Defferences from QB

▪QB does not support Unicode.

See also

▪InStr

▪Mid (Statement)

▪Lfft

▪Right

▪Asc