Initial data commit

Task/Variables/Commodore-BASIC/variables-3.basic

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+REM Tiny Basic has exactly 26 variables.
+REM They start off initialised to zero.
+    PRINT A
+
+REM The only data type is sixteen-bit signed integer.
+REM They are assigned using the LET statement.
+REM Their scope is the whole program.
+    LET B = -12345
+REM The integer arithmetic operations of  +  -  *  and / can be used
+REM and so can the unary negative and positive operators -  +
+    LET C = 1 + B - B/5
+    LET A = -B
+    PRINT "B is ", B
+    PRINT "C is ", C
+    GOSUB 10
+
+REM The comparison operators =  <  >  <=  >=  <> are available,
+REM but their results are not expressions and can only be used in an
+REM if statement.
+    LET D = 3
+    IF D <> 7 THEN LET D = 7
+    GOTO D-2
+    PRINT "Skip this"
+ 5  PRINT "Gotos and gosubs can be computed. Beware of moving spaghetti."
+    END
+10  PRINT "B is now ", B
+    RETURN
+
+REM Tiny Basic does not support arrays or pointers. Strings can
+REM be used, but only as string constants within a PRINT statement.