Arithmetical and logical operations

Primitives	Arguments	Utilisation
Primitives	Parameters	Usage
sum	a b: numbers to add	Adds the two numbers a and b and returns the result
		Eg: sum 40 60 returns 100
difference	a b: numbers	Returns a-b.
		Eg: difference 100 20 returns 80
minus	a : number	Returns the negative of a.
		Eg: minus 5 returns -5. See the note at the end of this table.
product	a b : numbers	Returns the result of multiplying a by b.
div, divise	a b: numbers	Returns the result of dividing a by b
		div 3 6 returns 0.5
quotient	a b: numbers	Returns quotient a by b
		quotient 15 6 returns 2
mod, modulo	a b: whole numbers	Returns the remainder after dividing a by b.
round, rnd	a: number	Returns the nearest whole number to the number a.
		round 6.4 returns 6
integer	a: number	returns the integer part of the number. integer 8.9 returns 8
		integer 6.8 returns 6
power	a b: numbers	Returns a raised to the power of b.
		power 3 2 returns 9
sqrt , sqrt	n : number	returns the square root.
log	n : number	Returns the logarithm of n
exp	n : number	Returns the exponential of n
log10	n : number	Returns the decimal logarithm of n
sin, sine	a: number	Returns the sine of a. (a is expressed in degrees)
cos, cosine	a: number	Returns the cosine of a. (a is expressed in degrees)
tan, tangent	a: number	Returns the tangent of a. (a is expressed in degrees)
acos, arccosine	a: number	Returns the angle in range [0-180] which cosine is a.
asin, arcsine	a: number	Returns the angle which sine is a.
atan, arctangent	a: number	Returns the angle which tangent is a.
pi	aucun	Returns the number $\pi$ (3.141592653589793)
random, ran	n: whole number	Returns a random number between 0 and $n-1$.
absolute, abs	n: nombre	Returns the absolute value (its numerical value without regard to its sign) of a number.

Important : Be careful with those primitives which require two parameters!

Eg:

setxy a b	If b is negative
For example,	setxy 200 -10

The logo interpreter will carry out the operation 200-10 (ie it will subtract 10 from 200). It will therefore conclude that there is only one parameter (190) when it requires two, and will generate an error message. To avoid this type of problem, use the primitive ``minus'' to specify the negative number - setxy 200 minus 10.
This is a list of logical operators:

Primitives	Parameters	Usage
or	b: booleans	Returns true if a or b is true, otherwise returns false
and	b: booleans	Returns true if a and b is true, otherwise returns false
not	a :boolean	Returns the negation of a. If a is true, returns false. If a is false, returns true.