SPACE$ - mkilgore/QB64pe GitHub Wiki

The SPACE$ function returns a STRING consisting of a number of space characters.

Syntax

result$ = SPACE$(count&)

Parameters

  • count& is the number of space characters to repeat. Cannot use negative values!
Usage:
  • Semicolons can be used to combine spaces with text STRING or numerical values.
  • Concatenation using + can be used to combine STRING text values only.
  • Spaces are often used to erase previous text PRINTs from the screen.
  • The function result can also be used to GET and PUT a number of bytes as zero characters: bytes$ = SPACE$(numbytes)
  • Spaces can also be made using SPC, CHR$(32) or STRING$(n%, 32).
Differences between QB64 and QB 4.5:
  • QB64 can use LONG values for count up to 2,147,483,647 while QB 4.5 could only use INTEGER values up to 32,767.
Example 1: How to space text in a PRINT statement using SPACE$ with string concatenation. 
 '' ''
FOR...NEXT count% = 0 FOR...NEXT 3
    PRINT "abc" + SPACE$( count% ) + "def"
FOR...NEXT count%

abcdef
abc def
abc  def
abc   def

Example 2: In SCREEN 0 SPACE$ can be used to change the background color to make an American flag. 

 USA flag centered on screen with thin horizontal red & white stripes
' blue corner field with randomly twinkling stars
CLS
LOCATE 25, 1
PRINT "Press any key to stop twinkling";
COLOR , 4
z = 15
FOR...NEXT x = 5 TO 19          '13 red & white stripes (x =5 to 21 for 15 stripes)
    IF...THEN z = 15 THEN z = 4 ELSE z = 15
    COLOR , z
    LOCATE x, 15
    PRINT SPACE$(55)
NEXT x
FOR...NEXT x = 5 TO 11          'blue field in upper left quadrant (x = 5 to 13 to hold all 50 stars)
    COLOR 15, 1            'sits above 4th white stripe
    LOCATE x, 15
    PRINT SPACE$(23)
NEXT x
DO
    stop$ = INKEY$
    FOR...NEXT x = 5 TO 10 STEP 2  '39 stars staggered across blue field (50 stars if x = 5 to 12)
        w = 16
        FOR...NEXT y = 1 TO 6      '5 rows of 6 stars
            r = INT(RND * 6)
            IF...THEN r = 0 THEN z = 31 ELSE z = 15
            IF...THEN stop$ = "" THEN COLOR z ELSE COLOR 15
            LOCATE x, w
            w = w + 4
            PRINT "*";
        NEXT y
        w = 18
        FOR...NEXT y = 1 TO 5      '5 rows of 5 stars
            r = INT(RND * 6)
            IF...THEN r = 0 THEN z = 31 ELSE z = 15
            IF...THEN stop$ = "" THEN COLOR z ELSE COLOR 15
            LOCATE x + 1, w
            w = w + 4
            PRINT "*";
        NEXT y
    NEXT x
    w = 16
    FOR...NEXT y = 1 TO 6          '1 row of 6 stars
            r = INT(RND * 6)
            IF...THEN r = 0 THEN z = 31 ELSE z = 15
        IF...THEN stop$ = "" THEN COLOR z ELSE COLOR 15
        LOCATE x, w
        w = w + 4
        PRINT "*";
    NEXT y
    t = TIMER
    DO...LOOP WHILE t + .2 >= TIMER: LOOP
LOOP WHILE stop$ = ""
COLOR 7, 0
END
Code by Solitaire
Explanation: In SCREEN 0, the background color is only placed with the the printed text and spaces. CLS can color the entire screen.

See also

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