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Identifying keys on different keyboards

Characters can vary on different keyboards. Avoid possible confusion by identifying a character by its ASCII value.

| To obtain a character's ASCII value, use the `charToNum()` function. See `charToNum()`.
| For example, this statement finds the ASCII value for the letter A and displays it in the Message window:
    put charToNum("A")
    -- 65
| To find out which character corresponds to an ASCII value, use the `numToChar()` function. See `numToChar()`.
| For example, this statement finds the character that corresponds to the ASCII value 65. The result is the letter A:
    put numToChar(65)
    -- A