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Date tag: January 7 2010 5:40:45

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Date tag: January 7 2010 5:36:12

Executing a functional program means evaluation an expression. Most functional languages have an interactive runtime environment that can execute your program one line at a time. This is called a REPL, read eval print loop.

Date tag: January 7 2010 5:31:42

An expression is something that has a value and can be evaluated. A statment is a, possibly compound, task.

Date tag: January 7 2010 5:24:49

A side effect is a change to the global state, including input or output. They are central to the imperative programs. In functional programming, we try to avoid them as much as possible. Exceptions include function or constant definitions, read or write, or mutation.

Date tag: January 7 2010 5:24:42

In programming the domain is the arguments plus the global state. The range is the return type. In imperative languages void functions are excluded because they have interesting side effects.

Date tag: January 7 2010 5:24:30

What is a function

Date tag: January 7 2010 5:24:22

Imperative versus functional programming. Examples of imperative languages are C, C plus plus, Java, and Python. In imperative programs are a sequence of statements. Each statement is a task. Examples of functional languages are scheme, LISP, Haskall.

Date tag: January 5 2010 6:16:32