.he 'ASCII''Page %'
.fo 'Steven Hardy'%'January 78'
`
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The "grave" symbol, sometimes use as a closing quote to match "'"
can be used if your program needs to use the ascii code for some
character. If you type the character "`" immediately followed by any
other character, then the effect is exactly the same as if you had typed
an integer corresponding to the ascii code for the second character.
The code for an "a" is 97, so:
 	: `a -> X; and 97 -> X;
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are equivalent.
 	: `0	is 48
 	: `1	is 49
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E.g. try
 	: `0 =>
 	: `2 =>
 	: `: =>
 	: `b =>
 	: `z =>
 	: ` =>
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The last example will produce the ascii code for space, which is 32.
Thus, to find out if the value of X is the code for a letter, and if
so to apply the function CHAROUT to it, do
 	: IF	`A =< X AND X =< `Z
 	: THEN	CHAROUT(X)
 	: CLOSE;
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If you use a teletype without upper and lower case, then the individual
character ` will not be available to you. Instead, type
 	: HELP ASCII;
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and see how the character is printed out on your terminal. You can then
type in the same thing. You'll need to use the "special" UNIX character,
which is SHIFT and L on teletypes, followed by the "string quote" symbol: "'".
