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September 2017 Update

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Ingy döt Net 2017-09-23 10:01:46 +02:00
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Task/Operator-precedence/REXX/operator-precedence.rexx
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/*
╔══════════════════════════════════════════════════════════════════════╗
║ ║
║ The following is a table that lists the precedence and associativity ║
║ of all the operators in the (classic) REXX language. ║
║ ║
║ 1 is the highest precedence. ║
║ ║
╠══════════╤════════╤══════════════════════════════════════════════════╣
║ │ │ ║
║precedence│operator│ description ║
║ │ │ ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 1 │ - │ unary minus ║
║ │ + │ unary plus ║
║ │ \ │ logical not ║
║ │ ├──(the following aren't supported by all REXXes)──╢
║ │ ¬ │ logical not ║
║ │ ~ │ logical not ║
║ │ ^ │ logical not ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 2 │ ** │ exponentiation (integer power) ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 3 │ * │ multiplication ║
║ │ / │ division ║
║ │ % │ integer division ║
║ │ // │ modulus (remainder division, sign of dividend)║
║ │ / / │ modulus (any 2 or 3 character operators may ║
║ │ │ have whitespace between characters.) ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 4 │ + │ addition ║
║ │ - │ subtraction ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 5 │ || │ concatenation ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 6 │ & │ logical AND ║
║ │ | │ logical OR (inclusive OR) ║
║ │ && │ logical XOR (exclusive OR) ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 7 │[blank] │ concatenation ║
║ │abuttal │ concatenation ║
╟──────────┼────────┼──────────────────────────────────────────────────╢
║ 8 │ = │ equal to ║
║ │ == │ exactly equal to (also, strictly equal to) ║
║ │ \= │ not equal to ║
║ │ <> │ not equal to (also, less than or greater than) ║
║ │ >< │ not equal to (also, greater than or less than) ║
║ │ > │ greater than ║
║ │ >= │ greater than or equal to ║
║ │ < │ less than ║
║ │ <= │ less than or equal to ║
║ │ >> │ exactly greater than ║
║ │ << │ exactly less than ║
║ │ <<= │ exactly less than or equal to ║
║ │ >>= │ exactly greater than or equal to ║
║ │ ├──(the following aren't supported by all REXXes)──╢
║ │ /= │ not equal to ║
║ │ ¬= │ not equal to ║
║ │ ~= │ not equal to ║
║ │ ^= │ not equal to ║
║ │ /== │ not exactly equal to ║
║ │ \== │ not exactly equal to ║
║ │ ¬== │ not exactly equal to ║
║ │ ~== │ not exactly equal to ║
║ │ ^== │ not exactly equal to ║
║ │ /< │ not less than ║
║ │ ~< │ not less than ║
║ │ ¬< │ not less than ║
║ │ ^< │ not less than ║
║ │ /> │ not greater than ║
║ │ ¬> │ not greater than ║
║ │ ~> │ not greater than ║
║ │ ^> │ not greater than ║
║ │ /<= │ not less than or equal to ║
║ │ ¬<= │ not less than or equal to ║
║ │ ~<= │ not less than or equal to ║
║ │ ^<= │ not less than or equal to ║
║ │ />= │ not greater than or equal to ║
║ │ ¬>= │ not greater than or equal to ║
║ │ ~>= │ not greater than or equal to ║
║ │ ^>= │ not greater than or equal to ║
║ │ \>> │ not exactly greater than ║
║ │ ¬>> │ not exactly greater than ║
║ │ ~>> │ not exactly greater than ║
║ │ ^>> │ not exactly greater than ║
║ │ \<< │ not exactly less than ║
║ │ ¬<< │ not exactly less than ║
║ │ ~<< │ not exactly less than ║
║ │ ^<< │ not exactly less than ║
╚══════════╧════════╧══════════════════════════════════════════════════╝ */