Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Introduction to Variables in Creative Programming

Description

This lecture introduces the concept of variables as the final ingredient in creative programming, allowing the coding of a complete video game with multiple levels on Scratch. It also explores strategies to win a game and the historical perspective of computer invention.

Official source

Related concepts (4)

Conditional sentence

Conditional sentences are natural language sentences that express that one thing is contingent on something else, e.g. "If it rains, the picnic will be cancelled." They are so called because the impact of the main clause of the sentence is conditional on the dependent clause. A full conditional thus contains two clauses: a dependent clause called the antecedent (or protasis or if-clause), which expresses the condition, and a main clause called the consequent (or apodosis or then-clause) expressing the result.

Material conditional

The material conditional (also known as material implication) is an operation commonly used in logic. When the conditional symbol is interpreted as material implication, a formula is true unless is true and is false. Material implication can also be characterized inferentially by modus ponens, modus tollens, conditional proof, and classical reductio ad absurdum. Material implication is used in all the basic systems of classical logic as well as some nonclassical logics.

Counterfactual conditional

Counterfactual conditionals (also subjunctive or X-marked) are conditional sentences which discuss what would have been true under different circumstances, e.g. "If Peter believed in ghosts, he would be afraid to be here." Counterfactuals are contrasted with indicatives, which are generally restricted to discussing open possibilities. Counterfactuals are characterized grammatically by their use of fake tense morphology, which some languages use in combination with other kinds of morphology including aspect and mood.

Indicative conditional

In natural languages, an indicative conditional is a conditional sentence such as "If Leona is at home, she isn't in Paris", whose grammatical form restricts it to discussing what could be true. Indicatives are typically defined in opposition to counterfactual conditionals, which have extra grammatical marking which allows them to discuss eventualities which are no longer possible. Indicatives are a major topic of research in philosophy of language, philosophical logic, and linguistics.

Related lectures (31)

Adding a Variable

Demonstrates adding a variable to track levels in a program.

Bobby's Story

Explores the first part of Bobby's story through a simple code demonstrating Bobby's actions and thoughts.

Encode Your Avatar in a List

Covers the process of encoding an avatar in a list using blocks.

Loops: Implementing a Repeat Loop

Presents an exercise solution example on implementing a repeat loop in Scala.

Winning Strategy: Nim Game MOOC: The Thymio robot as a tool for discovering digital science

Delves into transforming a winning strategy in the Nim game into an algorithm.

Related concepts (4)

Conditional sentence

Material conditional

Counterfactual conditional

Indicative conditional