Data Types
Bayani Gaba-gaba
Everything inside a computer is a pattern of bits, and a pattern of bits on its own means nothing whatever. The same eight bits, 01000001, are the number 65, the letter A, one pixel of a photograph and part of a machine instruction, depending entirely on what the machine has been told the pattern is for. That instruction is the data type, and without it a computer cannot tell an amount of money from a name.
This lesson covers the five types the specification names: integer, real, Boolean, character and string. You will learn what each one holds, what operations each one supports, and how to choose between them for a given piece of information, which is the form the exam question almost always takes. You will also learn two distinctions that catch people out every year: why a whole number stored as a real is not the same thing as an integer, and why a telephone number is a string.
Manufura
- Understand the concept of a data type.
- Understand and use the following appropriately:
- integer
- real
- Boolean
- character
- string.
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Nazarin Darasi
Barka da kammala darasi akan Data Types. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which data type should be used to store whether a light is switched on? A. Boolean B. Character C. Integer D. String Answer: A
- Which value could be stored in a variable of type integer? A. 4.0 B. -17 C. False D. seventeen Answer: B
- A postcode such as 0X4 2AB is to be stored. Which is the most appropriate data type? A. Boolean B. Character C. Integer D. String Answer: D
- Which statement about the character type and the string type is correct? A. A character can hold any number of symbols B. A string must contain at least one character C. A character holds exactly one symbol and a string holds any number D. Characters and strings are stored identically in all languages Answer: C
- A program reads 8 and 3 from the keyboard and outputs 83 instead of 11. What is the most likely cause? A. The values were stored as strings and joined rather than added B. The values were stored as Booleans C. Whole-number division was used D. The variables were declared as reals Answer: A
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