RosettaCodeData/Task/Pangram-checker/Liberty-BASIC/pangram-checker.basic

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'Returns 0 if the string is NOT a pangram or >0 if it IS a pangram
string$ = "The quick brown fox jumps over the lazy dog."
Print isPangram(string$)
Function isPangram(string$)
string$ = Lower$(string$)
For i = Asc("a") To Asc("z")
isPangram = Instr(string$, chr$(i))
If isPangram = 0 Then Exit Function
Next i
End Function