Fundamentals of CS I (CS151 2001S) : Reference

make-string - build a string by repeating one letter

Parametersn, a non-negative integer
c, a character
PurposeGenerates a string that contains n copies of c.
Producesstr, a string.
PreconditionsOne or two parameters (verified).
n is a non-negative integer (verified).
c is a character (verified).
PostconditionsThe result is a string.
(string-ref str i) produces c for i from 0 to n-1.
> (make-string 5 #\a)
> (make-string 0 #\a)
> (make-string 3 "a" "b")
make-string: expects 1 to 2 arguments, given 3: 3 "a" "b"
If the second parameter is not supplied, creates
  a string of the appropriate length, but filled with
  null characters (#\nul).
See Also

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