Question

72, 'A', and "Hello World" are all examples of________.

Short answer

Answer: They are all examples of data types.

Step-by-step solution

Identify the examples

The given examples are 72, 'A', and "Hello World". They are different in nature, but they share a common concept.

Recall common concepts in programming

Recall the terminology used in programming and computer science. One important concept that might relate to these examples is variables and their values, specifically the data types of these values.

Analyze the data types

Let's look at the data types of the given examples: - 72 is an integer, which is a whole number. - 'A' is a character, which represents a single symbol, letter, or digit. - "Hello World" is a string, which is a sequence of characters.

Identify the common feature

The common feature among the three examples is that they are all examples of different data types used in programming and computer science. So, the answer is: 72, 'A', and "Hello World" are all examples of **data types**.

Key concepts

Integer

An integer is a data type that represents whole numbers without any fractional or decimal component. Integers can have positive, negative, or zero values. In programming and mathematics, integers are widely used for calculations that require counting or iteration. For example, the number 72 is an integer because it is a whole number with no decimal places or fraction involved.

• Integers include all positive whole numbers, such as 1, 2, 3, etc.
• Negative whole numbers like -1, -2, -3 are also integers.
• The number zero (0) is also considered an integer.

Mathematically, integers are denoted by the symbol \( extbf{Z}\). Depending on the programming language, integers may have specific size limits, affecting the range of numbers they can represent. Knowing how and when to use integers efficiently is key in solving many computational problems.

Character

A character is a data type that represents a single symbol, letter, or number. In programming languages, a character is typically enclosed within single quotes, such as 'A', to denote it as a character data type.

• Characters can be any letter from the alphabet.
• They can also be digits, like '5', or special symbols, such as '#'.
• Each character has a corresponding numerical value called the ASCII code.

For example, 'A' is a character type where it represents the symbol 'A'. The ASCII value for 'A' is 65, which is how computers understand and manipulate character data. Knowing how to work with characters is essential for tasks involving text processing, such as parsing or pattern matching.

String

Strings are sequences of characters, which can include letters, numbers, spaces, and symbols. In programming, strings are usually enclosed in double quotes, like "Hello World", indicating that they consist of more than a single character.

• Strings can represent words, sentences, or even paragraphs.
• They support operations like concatenation (joining strings), slicing, and searching.
• Languages often provide specific functions to manipulate strings efficiently.

"Hello World" is a classic example of a string, commonly used in programming tutorials as the first program demonstrating output to a screen. Strings are versatile in handling textual data, making them crucial in applications ranging from simple greeting programs to complex data analysis.