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


function isPangram$(texto$)
    longitud = Length(texto$)
    if longitud < 26 then return "is not a pangram"
    t$ = lower(texto$)
    print "'"; texto$; "' ";
    for i = 97 to 122
        if instr(t$, chr(i)) = 0 then return "is not a pangram"
    next i
    return "is a pangram"
end function
 
print isPangram$("The quick brown fox jumps over the lazy dog.")   # --> true
print isPangram$("The quick brown fox jumped over the lazy dog.")  # --> false
print isPangram$("ABC.D.E.FGHI*J/KL-M+NO*PQ R\nSTUVWXYZ")          # --> true