Terminal calculator

A calculator in the terminal, similar to just running the python or node interpreters without any file

Features

• Correct left-assosiative precedence parsing
• Multiple output formats (hexadecimal, binary and decimal)
• Aliases for constants (true, false and PI)
• Expression history with up arrow and down arrow
• Common operators like bit shifting, remainder, etc
• Bitwise operators same as C but ^ is an exponent operator, # is xor eg 0b10101#0b011011
• Strings and chars. Can be provided as arguments to functions, eg len("Hello, world") // expected output: 12
• Constant functions

Functions

• sin(x) // x is in degrees
• cos(x) // x is in degreess
• tan(x) // x is in degrees
• atan(x) // x is in degrees
• deg(rad)
• rad(deg)
• fah(x) // x is in celcius
• cel(x) // x is in fahrenheit
• dec(x) // x is a number or character eg dec("A") // expected output: 65
• hex(x) // x is a number or character eg hex(0b1000001) // expected output: 0x41
• bin(x) // x is a number or character eg bin(0xF) // expected output: 0b1111
• round(x) // x is a number
• floor(x) // x is a number
• ceil(x) // x is a number
• abs(x) // x is a number
• len(str) // str is a string eg "Hello, буржуй"
• chr|char(x) // x is a number of the ascii character code eg chr(65) + "n" + char(100) // expected output: "And"