To return a string of x spaces.
SPACE$(x)
x is rounded to an integer and must be within the range of 0 to 255 (see SPC function).
10 FOR N=1 TO 5 20 X$=SPACE$(N) 30 PRINT X$; N 40 NEXT N RUN 1 2 3 4 5
Line 20 adds one space for each loop execution.