LOGO Primitives

Command	Short Form	Example	Description
Chapter 9
MAKE	MAKE	MAKE “X 50	Defines a global variable and assigns an initial value.
LOCAL	LOCAL	LOCAL “X	Changes a global variable to a variable that is local to the procedure where this command occurs.
Command	Short Form	Example	Description
Chapter 11
PRINTOUT NAMES	PO NAMES	PO NAMES	Prints out all of the global variables.
ERN	ERN	ERN “X	ERN removes the variable(s) specified by its input from the Logo workspace
ERASE NAMES	ERASE NAMES	ERASE NAMES	ERASE NAMES removes all user-defined variables from the workspace.
Command	Short Form	Example	Description
Chapter 12
REMAINDER		REMAINDER 5 2 Result: 1	Reports an integer remainder of the first number divided by the second number.
INT		INT 8.9 Result: 8	INT reports the integer portion of its input by removing the decimal portion, if any. No rounding occurs.
ROUND		ROUND 1.5 Result: 2	ROUND reports the input number rounded to the nearest integer.
SQRT		SQRT 2 Result: 1.41	Outputs the square root of its input. The input number must be a positive number.
ATAN		ATAN 0.5 Result: 26.57	Gives the arctangent of its input.
SIN		SIN 30 Result: 0.5	SIN reports the sine of its input, which is the number of degrees in an angle. Remember that SIN x =opposite/hypotenuse.
COS		COS 60 Result: 0.5	COS reports the cosine of its input, which is the number of degrees in an angle. Remember that COS x =adjacent/hypotenuse.
RANDOM		RANDOM 5 This could report a 1, 2, 3, 4, or 5	RANDOM reports a randomly selected number from 1 through its input. The output can only be a positive integer.
ABS		ABS –10 Result: 10	ABS reports the absolute value of its input.
PI		PI Result: 3.14	Reports the value of PI