Calculator

A powerful console-based calculator written in Python. Supports basic arithmetic, bitwise logic, trigonometry, statistics, cryptographic hashing, base conversions, combinatorics, and secure lambda-based evaluation engine.

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Features:

• All functions are accessible through intuitive symbols

• Includes 36 operations

• Allows safe evaluation of custom expressions with lambda

• Colored output for better readability

To display the general help, just enter ? during calculator use.

Requirements

• Python 3.8+

• colorama (for colored terminal output)

pip install colorama

How to run

Open a terminal in the project folder and run:

python main.py

Operations

Key	Function	Example Expression
+	Addition	2 + 3
-	Subtract	10 - 4
*	Multiply	6 * 9
/	Divide	20 / 5
^	Power	2 ** 3
r	Root	16 ** (1/2) for √16
%	Percent of	(20 / 100) * 200
m	Modulo	10 % 3
l	Logarithm	math.log(8, 2)
e	Exponent	math.exp(1)
g	GCD	math.gcd(20, 12)
i	Mod Inverse	pow(3, -1, 11)
p	Permutation	math.perm(5, 2)
k	Combination	math.comb(5, 2)
s	Sine	math.sin(math.pi/2)
c	Cosine	math.cos(0)
t	Tangent	math.tan(math.pi/4)
!	Factorial	math.factorial(5)
x	XOR	5 ^ 3
<	Rotate Left	(x << y) │ (x >> (bits - y))
>	Rotate Right	(x >> y) │ (x << (bits - y))
o	Round	round(3.1415, 2)
&	Random (RNG)	random.randint(1, 10)
b	Binary	bin(10)
8	Octal	oct(10)
h	Hexadecimal	hex(255)
f	From Base	int('1010', 2)
5	MD5 Hash	hashlib.md5(b"hello").hexdigest()
6	SHA256 Hash	hashlib.sha256(b"hello").hexdigest()
a	Average	sum([1, 2, 3, 4]) / len([1, 2, 3, 4])
#	Median	statistics.median([1, 3, 2, 4])
$	Lambda (safe eval)	eval("sin(pi / 2)", {"__builtins__":{}}, ...)
3	Quadratic Formula	quadratic(1, -3, 2) → roots of x²-3x+2
d	Date Now	int(time.time())
q	Quit	Exit program
?	Help	Show help menu