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Questions and Answers
What is the primary purpose of an array in programming?
How do you declare an array in C++?
What is the purpose of an array literal in C++?
How do you access an array element in C++?
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What is the index number of the first element in an array?
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What is the purpose of the 'cout' statement in the example code?
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What is the data type of the array 'cars' in the example code?
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What is the number of elements in the array 'myNum' in the example code?
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What is the characteristic of an array variable?
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What is the purpose of specifying the number of elements in an array declaration?
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What is the advantage of using an array literal?
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What happens when you access an array element by referring to its index number?
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What is the difference between declaring an array and declaring a single variable?
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What is the purpose of the 'square brackets' in an array declaration?
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How do you create an array of three integers in C++?
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What is the purpose of the curly braces in an array literal?
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What is the advantage of using arrays in C++ programs?
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What is the purpose of the array index number?
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Study Notes
Array Overview
- An array is a special type of variable that can contain one or more values of the same data type.
- An array has a common name identifier or variable name and can hold many values at the same time, provided they have the same data type.
Learning Outcomes
- Describe the nature and purpose of an array.
- Use arrays in simple C++ programs.
- Declare, instantiate, and initialize arrays.
- Define methods that have an array as a parameter.
Declaring an Array
- To declare an array, define the variable type, specify the name of the array, and enclose the number of elements in square brackets.
- Example:
string cars[4];declares an array of four strings.
Initializing an Array
- Use an array literal to insert values into an array, by placing the values in a comma-separated list inside curly braces.
- Example:
string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"];initializes an array of four strings. - Example:
int myNum[3] = {10, 20, 30};initializes an array of three integers.
Accessing Array Elements
- Access an array element by referring to the index number.
- The first element of an array has an index of 0.
- Example:
cars[0]accesses the value of the first element in thecarsarray.
Array Overview
- An array is a special type of variable that can contain one or more values of the same data type.
- An array has a common name identifier or variable name and can hold many values at the same time, provided they have the same data type.
Learning Outcomes
- Describe the nature and purpose of an array.
- Use arrays in simple C++ programs.
- Declare, instantiate, and initialize arrays.
- Define methods that have an array as a parameter.
Declaring an Array
- To declare an array, define the variable type, specify the name of the array, and enclose the number of elements in square brackets.
- Example:
string cars[4];declares an array of four strings.
Initializing an Array
- Use an array literal to insert values into an array, by placing the values in a comma-separated list inside curly braces.
- Example:
string cars[4] = {"Volvo", "BMW", "Ford", "Mazda"];initializes an array of four strings. - Example:
int myNum[3] = {10, 20, 30};initializes an array of three integers.
Accessing Array Elements
- Access an array element by referring to the index number.
- The first element of an array has an index of 0.
- Example:
cars[0]accesses the value of the first element in thecarsarray.
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Description
Learn about arrays in C++ programming, a data structure that holds multiple values of the same data type. Understand the purpose and nature of arrays.
