Pangram checker

You are encouraged to solve this task according to the task description, using any language you may know.
A pangram is a sentence that contains all the letters of the English alphabet at least once.

For example:   The quick brown fox jumps over the lazy dog.



Task

Write a function or method to check a sentence to see if it is a   pangram   (or not)   and show its use.



Related tasks

   determine if a string has all the same characters
   determine if a string has all unique characters


0010 FUNC pangram#(s$) CLOSED
0020   FOR i#:=ORD("A") TO ORD("Z") DO
0030     IF NOT (CHR$(i#) IN s$ OR CHR$(i#+32) IN s$) THEN RETURN FALSE
0040   ENDFOR i#
0050   RETURN TRUE
0060 ENDFUNC
0070 //
0080 WHILE NOT EOD DO
0090   READ s$
0100   PRINT "'",s$,"' is ",
0110   IF NOT pangram#(s$) THEN PRINT "not ",
0120   PRINT "a pangram"
0130 ENDWHILE
0140 END
0150 DATA "The quick brown fox jumps over the lazy dog."
0160 DATA "The five boxing wizards dump quickly."