Functions > Boolean Algebra

For a discussion on Boolean Algebra support in MP, please refer to the Boolean Expressions section.

Working with Truth Tables is made easy through a simple GUI tool. Please refer to Truth Tables Easy Kit section for more details.

**Note:** Certain functions like first(), last() and count() described in the Array and Data Manipulation section also support Boolean Arrays.

The following functions are described in this Section:

Creates a Boolean array. Its format is:

bool (*val_1, val_2, ..., val_n *)

Here *val_1, val_2, ..., val_n* are any values that can evaluate to either 'true' or 'false'. The value **true** can be specified using the string literal 'true', a non-zero number or a Boolean variable or expression that evalulates to **true**. The value **false** can be specified using the string literal 'false', the number 0, or a Boolean variable or expression that evalulates to **false**.

**Examples:**

>> bool (true, false, true)

>> bool (0, 2, 3)

>> a = 10

>> bool (a > 100, a < 100, a == 100, a != 20, a == 10, a >= 2, a <= 20="" p="">

Creates columns of Truth Tables and names them for future reference. This way you can store premises and get the conclusions very conveniently. Its format is:

fillbool (*var_1, var_2, var_3, ....., var_n*)

*var_1, var_2, var_3, ..., var_n* are any valid variable names (left-hand side expressions). Each variable is assigned a Boolean array of required size and is initialized with proper values according to the order it appears.

**Example:**

Suppose you want to create a truth table for the Boolean expression:

**(a+b)*(a^b)^(a+b*c+(d^x)*y+z)**

**Note:** Here a,b,c etc. are Boolean variables and +,* and ^ are Boolean operators and not ordinary arithmetic operators.

The expression contains seven (7) Boolean variables. It means that each column of the truth table will have 2^7 = 128 rows! It is not quite convenient to create such a complex truth table manually. The function **fillbool** can create the required truth table very easily as shown below:

>> fillbool(a,b,c,d,x,y,z)

>> result = (a+b)*(a^b)^(a+b*c+(d^x)*y+z)

Spirograph (desktop) ** v-1.0.2.1** was released on April 23, 2015. Improvements include:

- Fill colors (with transparency)
- Two fill modes
- High resolution export for designers