Calculator Operators and Functions

Typing cal at the command line will toggle the calculator mode on and off.

Hint

Trigonometric functions expect angles in radians, they are identifiable by the function parameter (a) in the table! (radians = degrees*pi/180)

This is not very comfortable for humans, but there is a simple solution to pass angles in degrees.

Append the affix d to the degree value; thus, sin(90d) is a valid expression and will return the sinus of 90°.

As the calculator accepts arithmetic expressions and constants, this term will work too: sin(90*pi/180)

The part 90*pi/180 will be internally calculated and results in 1.57079632679, which is 90° in radians.

And of course, arithmetic expressions can be used for other function parameters too, e.g. to convert imperial to metric values and vice versa.

Functions

Name	Function / Operation	Usage
+	addition	x+y
-	subtraction	x-y
*	multiplication	x*y
/	division	x/y
^	raise x to the power of y	x^y
sin	sine function	sin(a)
cos	cosine function	cos(a)
tan	tangens function	tan(a)
asin	arcus sine function	asin(a)
acos	arcus cosine function	acos(a)
atan	arcus tangens function	atan(a)
sinh	hyperbolic sine function	sinh(a)
cosh	hyperbolic cosine	cosh(a)
tanh	hyperbolic tangens function	tanh(a)
asinh	hyperbolic arcus sine function	asinh(a)
acosh	hyperbolic arcus tangens function	acosh(a)
atanh	hyperbolic arcur tangens function	atanh(a)
log2	logarithm to the base 2	log2(x)
log10	logarithm to the base 10	log10(x)
log	logarithm to base e (2.71828…)	log(x)
ln	logarithm to base e (2.71828…)	ln(x)
exp	e raised to the power of x	exp(x)
sqrt	square root of a value	sqrt(x)
sign	sign function -1 if x<0; 1 if x>0	sign(x)
rint	round to nearest integer	rint(x)
abs	absolute value, negatives become positive	abs(x)
min	min of all arguments	min(x, y, …n)
max	max of all arguments	max(x, y, …n)
sum	sum of all arguments	sum(x, y, …n)
avg	mean value of all arguments	avg(x, y, …n)

Constsants

Name	Alias	Constant	Value
_pi	pi	The number π	3.141592653589793238462643
_e		Euler’s number	2.718281828459045235360287

Hint

Behind the scenes LibreCAD uses the muParser library for the command line and many input boxes. So the above information describes basically the features of muParser, which are implemented in LibreCAD.

For advanced users or the courious ones, you can read more about muParser on the inventors website:

Reference: https://beltoforion.de/en/muparser/index.php#idStart

But, be aware, that LibreCAD probably does not use the latest version of muParser. Also, it is not fully implemented. The muParser library has much more capabillities than LibreCAD uses.