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What is Variables

Chapter 502
Encyclopedia of Information Science and Technology, Second Edition
Are quantities that can take any value, and in Prolog are introduced as strings of characters starting with a capital letter. For example, “animal” is an atom in Prolog whereas “Animal” is a variable and can be instantiated for any animal.
Published in Chapter:
PROLOG
Bernie Garrett (University of British Columbia, Canada)
Copyright: © 2009 |Pages: 5
DOI: 10.4018/978-1-60566-026-4.ch502
Abstract
Prolog is a logic based programming language, and was developed in the early 1970s and is a practical programming language particularly useful for knowledge representation and artificial intelligence (AI) applications. Prolog is different from many common computer languages in that it is not a procedural language (such as Basic, C, or Java). It is an interpreted logic based declarative language and as such has no loops, jumps, type declarations or arrays, and no fixed control constructs. In the past this has led to the impression that Prolog is a restricted language, useful only for highly specialized programming tasks by enthusiasts (Callear, 1994; Krzysztof, 1997). However, this is not the case and modern versions of Prolog are well equipped and versatile, and can be used for any programming task. The latest generations of the language (e.g., Visual Prolog) can also be integrated into more common object oriented languages.
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Chapter 2
Linguistic Errors Across Languages: A Case Study of Turkish Students
Are factors that are taken into consideration when conducting studies due to their effect positively, negatively, or neutrally. Variables are varied and the most common ones are gender and age, particularly in the linguistic contexts.
Published in Chapter: Linguistic Errors Across Languages: A Case Study of Turkish Students; From: Global and Transformative Approaches Toward Linguistic Diversity
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Chapter 12
Coding Across the Curriculum: How to Integrate Coding Into Content Areas
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Chapter 13
Experimental Research
It is the object(s) of the study that can be measured to test hypotheses or answer research questions.
Published in Chapter: Experimental Research; From: Applied Linguistics and Language Education Research Methods: Fundamentals and Innovations
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Chapter 11
Data Envelopment Analysis in Healthcare Management: Overview of the Latest Trends
In the context of DEA, variables refer to the inputs and outputs used in the analysis. Inputs represent the resources used by a hospital or healthcare system, while outputs represent the outcomes or services provided.
Published in Chapter: Data Envelopment Analysis in Healthcare Management: Overview of the Latest Trends; From: Data Envelopment Analysis (DEA) Methods for Maximizing Efficiency
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