MID$ (statement)

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Revision as of 04:23, 18 September 2009 by imported>Clippy
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The MID$ statement specifies a position in a STRING to overwrite previous data.

Syntax: MID$(string_variable, start%, length%) = string_value

  • String variable is any STRING or ASCII character values in quotes or a variable.
  • Start specifies the string character to start and length reserves the space.
  • The string value to be placed in the string should be as long as the length reserved.
  • The length of the original string is NOT changed in any case! Excess characters will not be in the string.

Example: Using INSTR to locate the string positions and a MID$ statement to change the word.

a$ = "The cats and dogs where playing, even though dogs don't like cats."
start = 1 ' start cannot be 0 when used in INSTR!

position = INSTR(start, a$, "dog")
IF position THEN
MID$(a$, position, 3) = "rat" ' changes "dog" to "rat" when found
start = position + 1 ' advance one string character
LOOP UNTIL position = 0

Screen Results: The cats and rats were playing, even though rats don't like cats.

See also: MKI$, MKL$, MKS$, MKD$, STR$, HEX$, INSTR, Bitmaps, ASCII


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