eCalculator

Basic Operations: Input expression, press ENTER or click the C button. Press ESC to clear the input text. Press UP/DOWN to select history input. Click the result number to put it to input text. Numbers: Decimal by default. Prefix 0b for binary. Prefix 0x for hex. Underscore _ can be in a number ( exp. 10_000 ). Strings: Single/double quoted like 'abc' "str" Use "\" to escape special characters, like \' single quotation mark \" double quotation mark \\ reverse solidus \/ solidus \n newline \t horizontal tab \u???? 4 hex digits to represent a unicode char. \b *backspace \f *formfeed \r *carriage return * Those characters are not displayed in the screen. NOTE Actually it uses JSON's string format with additional "\'". You must follow its syntax or get an error. For more information you can visit http://json.org/ Currently supported operators Basic: + : Plus (+) - : Minus (−) * : Times (×) / : Divide (÷) % : Module Extanded: ** : Power // : Integer Divide */ : N-Power's Root: a */ b == a ** (1/b) Bitwise (integers only): ~ : Bitwise NOT & : Bitwise AND | : Bitwise OR ^ : Bitwise XOR Logical (true = 1, false = 0): ! : Logical NOT && : Logical AND || : Logical OR Relational (true = 1, false = 0): == : Equal != : Not equal > : Greater than < : Less than >= : Greater than or Equal to <= : Less than or Equal to Quest (lazy version): condition ? true value : false value for exp. 1 >= 2 ? 10 : 20 => 20 1 ? 2 ? 3 : 4 : 5 ? 6 : 7 = 1 ? (2 ? 3 : 4) : (5 ? 6 : 7) Operator Orders Use ( and ) to promote orders. 1 ** */ 2 * / % // 3 + - 4 ~ & | ^ 5 ! && || 6 == != > < >= <= 7 ? : Variable, Constants and Functions Assign Variable: = a = ... a = b = 3 => a = (b = 3) a = 1 + (b = 2) => a = 3, b = 2 [*] A variable could be assigned to a function. Constants: E: 2.7182818... PI: 3.1415926... Functions: abs: absolute value ln: log based on E lg lg10 log10: log based on 10 lg2 log2: log based on 2 log: log(number, base) sin, cos, tan/tg, ctan/ctg: Triangle functions ord/chr: convert between char and code. signed/unsigned: convert interger to signed/unsigned. Infix/Postfix Notation Infix (shortcut Ctrl+I): #{IN: 1+2} #{IN: 9*8-7/6} Postfix (shortcut Ctrl+R): #{RPN: 1 2 +} #{RPN: 9 8 * 7 6 / -} Mix up: #{RPN: 1 #{IN: 2+3} +} #{IN: 2+#{RPN: 9 8 * 7 6 / -}} Postfix Notation Syntax Operators: Unary: ~ #{RPN: 1 ~} ! #{RPN: 0 !} Not supported for conflict reason: + - ( Should use 0 and binary operators like #{RPN: 0 1 -} ) Binary: All supported. e.g. #{IN: 6*7+8/(9-5)} equals to #{RPN: 6 7 * 8 9 5 - / +} Trinary: #{IN: a ? b : c} equals to #{RPN: a b c ?} . No colon(:) Whitespaces and Commas Whitespaces are not necessary while no conflict. For ins., #{RPN: 6 7 * 8 9 5 - / +} could be #{RPN:6 7*8 9 5-/+} Comma(,)s are ignored in RPN mode. So you can use them instead of whitespaces. For exp., #{RPN:6 7*8 9 5-/+} could be #{RPN:6,7*,8,9 5,-,/,,+} Function call: fn(args...) equals to (args... fn), but no comma(,)s joined into the arguments. e.g. #{IN: log(n, b) } equals to #{RPN: ( n b log ) } #{IN: ord(c)} equals to #{RPN: (c ord) } #{IN: log(8**4, 6-2)} equals to #{RPN:(8 4**,6 2-,log)}