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Questions and Answers
What is the data type of the variable X5?
What is the size of memory allocated for the string '“JADARA”'?
What is the purpose of the #include directive in the context of strings?
What is the difference between string s1 and char s1[]?
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What is the value of the variable X4?
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What is the data type of the variable X2?
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What is the purpose of declaring a string variable?
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What is the difference between a string and a character?
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What is the size of memory allocated for the variable X3?
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What is the purpose of the directive #include in C++?
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Study Notes
Data Types and Declarations
- A string is a set of characters, represented as a sequence of letters in quotes.
- Examples of strings: "JADARA", "C++ is fun!", " " (empty string).
- A string variable stores a sequence of characters, and its size is variable.
- In contrast, a char variable stores a single character, and its size is 1 byte.
Declaration and Initialization of Strings
- The string type is not a built-in type in C++, so it requires the #include directive to use all its functions.
- A string can be initialized using the string keyword, e.g., string X6 = "JADARA";.
- A string can also be initialized as an array of characters, e.g., char s1[]= "AAAAA AA";.
Key Differences between string and char arrays
- A string variable is declared using the string keyword, while a char array is declared using the char keyword.
- A string variable can be initialized with a string literal, while a char array must be initialized with a character array.
- A string variable can be manipulated using string functions, while a char array must be manipulated using array operations.
Output
- The COUT statement is used to output strings and other variables to the console.
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Description
This quiz covers C++ strings and data types, including declarations and examples. Designed for computer science students in the Programming II course.
