make-string size &key initial-element element-type → string

size — a valid array dimension.

initial-element — a character. The default is implementation-dependent.

element-type — a type specifier. The default is character.

string — a simple string.

make-string returns a simple string of length size whose elements have been initialized to initial-element.

The element-type names the type of the elements of the string; a string is constructed of the most specialized type that can accommodate elements of the given type.

(make-string 10 :initial-element #\5) → "5555555555" 
(length (make-string 10)) → 10

The implementation.