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Key	Function	Notes
0 – 9, .	Numbers & Decimal	Standard keypad digits
+ - * /	Basic Operators	Add, Subtract, Multiply, Divide
Enter or =	Calculate Equals	Evaluates full expression
Backspace	Delete	Deletes previous digit
Esc or C	All Clear (AC)	Clears calculator state
^	Exponent / Power	xʸ (e.g. 2^10)
( )	Parentheses	Order of operations
S	sin(	Trigonometric sine
C	cos(	Trigonometric cosine
T	tan(	Trigonometric tangent
L	log(	Base-10 Logarithm
N	ln(	Natural Logarithm
P	π	Pi constant (3.14159...)
E	e	Euler's constant (2.71828...)