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Questions and Answers
In the given code, array.length determines the ______ of the array.
In the given code, array.length determines the ______ of the array.
size
The data type of the array variable in the code is an ______ of integers.
The data type of the array variable in the code is an ______ of integers.
array
In the for loop, the variable i is incremented by one in each ______.
In the for loop, the variable i is incremented by one in each ______.
iteration
The initial value assigned to the i variable in the for loop is ______.
The initial value assigned to the i variable in the for loop is ______.
The values 10, 20, 30, and 40 are the ______ stored in the array.
The values 10, 20, 30, and 40 are the ______ stored in the array.
System.out.println() is used to print the array's element to the ______.
System.out.println() is used to print the array's element to the ______.
The for loop continues as long as i is ______ than array.length.
The for loop continues as long as i is ______ than array.length.
The elements of the array are accessed using their ______ inside the loop.
The elements of the array are accessed using their ______ inside the loop.
Each value inside the {} when initializing the array is separated by a ______.
Each value inside the {} when initializing the array is separated by a ______.
The int keyword specifies that the array will store ______ values.
The int keyword specifies that the array will store ______ values.
Flashcards
What is an Array?
What is an Array?
A data structure that stores a fixed-size sequential collection of elements of the same type. Accessed using an index.
What is a 'for' loop?
What is a 'for' loop?
A loop that repeats a block of code a specific number of times. Useful for iterating through arrays.
What is a Variable?
What is a Variable?
It's a named storage location in a computer's memory that can hold a value.
What does array[i] do?
What does array[i] do?
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What is 'array.length'?
What is 'array.length'?
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What does 'System.out.println()' do?
What does 'System.out.println()' do?
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Study Notes
- The provided code snippet demonstrates a basic Java program that iterates through an integer array and prints each element to the console
Array Declaration and Initialization
int[] array = {10, 20, 30, 40};declares an integer array namedarrayand initializes it with the values 10, 20, 30, and 40int[]specifies that the array will hold elements of type integerarrayis the name given to the array variable{10, 20, 30, 40}is an array initializer, which provides the initial values for the array elements- The size of the array is implicitly determined by the number of elements in the initializer list (which is 4 in this case)
- Array indices in Java are zero-based, meaning the first element is at index 0, the second at index 1, and so on
For Loop
for (int i = 0; i < array.length; i++)is aforloop that iterates through the arrayint i = 0initializes a loop counter variableito 0i < array.lengthis the loop condition, which checks if the value ofiis less than the length of the arrayarray.lengthreturns the number of elements in the array (which is 4)i++increments the value ofiby 1 after each iteration of the loop
Printing Array Elements
System.out.println(array[i]);prints the value of the element at indexiof the array to the consoleSystem.out.println()is a standard Java method for printing output to the console, followed by a newlinearray[i]accesses the element at indexiof the array- In each iteration of the loop, the value of
ichanges, so a different element is printed each time - The output of this code will be each element of the array printed on a new line: 10, 20, 30, and 40
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