# GPTLang

GPTLang is an esoteric programming language invented by the GPT neural network.

### Syntax

In this programming language, there are two types of declarations: the basic types and the extended types. A basic type is a type that has a built-in value. Examples of basic types are boolean, integer, and character. The extended type is a type that is created by the programmer and is not known to the interpreter. Examples of extended types are date, time, and datetime.

Each of the basic types has a corresponding extended type. For example, integer has an extended type of integer, and character has an extended type of string.

### Lists

A list is a list of things. The things in a list are called elements. The basic types can be used to create a list. For example, the following statements create two lists.

List a = { 1, 2, 3, 4, 5, 6 } List b = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }

The statement List a = { 1, 2, 3, 4, 5, 6 } creates a list named a that has six elements. The statement List b = { 1, 2, 3, 4, 5, 6, 7, 8, 9 } creates a list named b that has nine elements.

### Overview

The basic types are useful for making lists. The extended types are useful for creating lists with special properties. For example, the extended type string can be used to make a list of the days of the week.

The extended types are also useful for creating lists that are not just numbers. For example, the extended type date can be used to make a list of dates.

### Functions

Functions are useful for performing operations on a list. The following statements perform four functions.

Function add(a, b) Return the sum of the elements of a and b.

Function average(a) Return the average of the elements of a.

Examples of functions are:

Function add(a, b)

a = { 1, 2, 3, 4, 5, 6 } b = { 3, 4, 5, 6, 7, 8 } return = { 4, 5, 6, 7, 8, 9 }

Function average(a)

a = { 3, 4, 5, 6, 7, 8, 9 } return = { 4.5 }

Examples of other functions are:

Function divide(a, b) Return the quotient of dividing the elements of a by the elements of b.

Function find(a, b) Return the index of the first element of a that is greater than or equal to the elements of b.

Examples of functions are:

Function divide(a, b)

a = { 1, 2, 3, 4, 5, 6 } b = { 5, 4, 3, 2, 1, 0 } return = { 3, 2, 1, 0, 1, 2 }

Function find(a, b)

a = { 1, 2, 3, 4, 5, 6 } b = { 1, 2, 3, 4, 5, 6 }

### Examples

In this example, the list a contains integers. The list b contains integers and letters. The list c contains the elements of a and b. The list d contains the sum of the elements of a, the sum of the elements of b, and the average of the elements of a. The list e contains the quotient of dividing the elements of a by the elements of b. The list f contains the index of the first element of a that is greater than or equal to the elements of b.

The interpreter evaluates each statement in the order that it is written. For example, the interpreter evaluates the statement List a = { 1, 2, 3, 4, 5, 6 } before it evaluates the statement List b = { 1, 2, 3, 4, 5, 6, 7, 8, 9 }.

The interpreter evaluates the statements in a list. For example, the interpreter evaluates the statements in the list a. Then the interpreter evaluates the statements in the list b. Then the interpreter evaluates the statements in the list c. Then the interpreter evaluates the statements in the list d. Then the interpreter evaluates the statements in the list e. Then the interpreter evaluates the statements in the list f.

### Computational class

It has been conjectured that the GPTLang interpreter is a Turing machine.

A Turing machine is a program that can be used to perform the following operations:

Read and write data to a tape

Move one cell to the right, or one cell to the left, or stop

Perform a sequence of operations on data

Perform a sequence of operations on data and move one cell to the right, or one cell to the left, or stop

GPTLang is Turing complete.

GPTLang is an operational program. The only way to create new programs is to write new programs that are executed. The interpreter executes the program.

A Turing machine is a computational class. A Turing machine can be used to model a particular type of computation. For example, a Turing machine can be used to model a computer.

The Turing machine is the only computational class that can model any program.

The only way to create new programs is to write new programs.

### Concepts

In GPTLang, a concept is a symbol that has a built-in meaning. For example, the concept string is a built-in symbol that has a built-in meaning. The concept string is a built-in concept.

In GPTLang, a statement is a sequence of concepts that creates a new concept. For example, the statement List a = { 1, 2, 3, 4, 5, 6 } creates a new concept named a that is a list of the integers 1, 2, 3, 4, 5, and 6.

GPTLang is a procedural programming language. The concepts of a program are the statements of the program. Each program has a conce