Define a primitive data type: Difference between revisions

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 say a.to_hex;        # => "0x9" -- an hexadecimal string
-say a+b;            # error: Invalid value '15'; must be between 1 and 10</lang>
+a -= 7;              # a=2
+say (a + b);         # => 8 -- the result of (2 + 6)
+a += 4;              # a=6
+say a+b;             # error: Invalid value '12'; must be between 1 and 10</lang>
 =={{header|Tcl}}==