If you divide two integers you will end up with an integer.ДЄs you can see from the examples, an integer returns the result of the division as the integer portion of the result and leaves off the decimal portion. Integer division is not like floating point division. The real problem with using numbers when youвЂ™re not sure of their type is when you end up with two integer numbers. Point data is returned as floating-point numbers, and that is usually what we are dealing with. Most of the time you will be dealing with floating point numbers. Its complementary function is FLOAT, which converts integer numbers to floating-point numbers. The predefined function FIX converts a floating-point number to an integer number. The number 0.4 would be recognized as a floating-point value.ДЄutoLISP will automatically convert types for you when you mix them in your equations. The AutoLISP interpreter would, not accept the number. A floating-point number must be written with leading 0's if the number is less than 1. Real numbers, or floating point, are double precision floating point values with at least 14 significant digits of precision. The + sign is optional as any number without a - sign is taken to be positive. A real number is a floating-point number.ДЄn integer can be any number between -2,147,483,648 and +2,147,483,647. All you need to do to get the value of PI is type PI into your formulas.ДЄutoLISP has two types of numbers, integers and reals. The value PI has been made a constant in AutoLISP, because it is used so frequently when calculating angles. PI is a good example of a constant name, it tells exactly what it is. Remember when naming your constants to give them names that describe what they are. It makes it much easier to read and modify a program if constants with GOOD names are used instead of numbers. The magic part comes in when you go back later to modify a program that works, and you find literal numbers everywhere but have no idea what they are. There's nothing 'magic' about magic numbers. The use of magic numbers should be avoided if at all possible. Sin Returns the sine of a number in radians.Д¬os Returns the cosine of a number in radians.ДЄtan Returns the arctangent of a number in radians. Rem Returns the remainder of the division of two numbers.

Gcd Returns the greatest common denominator of two integer numbers. e is the constant 2.71828.Д®xpt Returns a number raised to the power of another number. Sqrt Returns the square root of a number.Д®xp Returns e raised to the power of a number. Max Gets the maximum number from a list of numbers.ДЄbs Returns the absolute value of a number. Min Gets the minimum number from a list of numbers. The AutoLISP functions for dealing with numbers are listed below. Most of the programs you write will be calculating numbers & telling the user what you calculated. Learning to use numbers & strings is the single most important thing you can do to increase your productivity by using LISP. If you get confused at first just try to visualize the operator placed between the two numbers that follow the operator.ДЄutoLISP has many functions built right in for using numbers and strings. The rest of the math function works the same way.

If you want to add two numbers you first give the function name which is '+' then you give the numbers you want the addition performed on. If you wanted to add two numbers you would write it:ДЄs you should know by now, all lists in AutoLISP start with a function and the remainder of the list is the arguments to the function. The normal way you write equations is using an infix notation. AutoLISP uses a prefix notation for evaluating math expressions.

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