For Loop
Definition
A for loop is a control flow statement that allows you to repeatedly execute a block of code for a specified number of times or until certain conditions are met.
Analogy
Imagine being on an assembly line where you have to perform the same task multiple times. A for loop is like having instructions that tell you exactly how many times you need to repeat that task before moving on.
Related terms
While Loop: A while loop repeatedly executes a block of code as long as a given condition remains true.
Loop Variable: The loop variable is a variable that keeps track of the current iteration or count in a loop.
Nested Loop: A nested loop is a loop inside another loop. It allows you to perform more complex repetitive tasks by iterating over multiple sets of data simultaneously.
"For Loop" appears in:
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Practice Questions (20+)
How is a for loop different from a while loop?
What part of a for loop determines when the for loop terminates?
How can a for loop be converted into a while loop?
What is the purpose of the incrementer in a for loop?
When would you choose a while loop over a for loop?
What part of a for loop isn't necessary?
What while loop will give the same output as this for loop: for (int i = 0; i < 10; i++) { System.out.println(i); }
Where does the conditional expression appear in a for loop?
Where is the incrementer executed in a for loop?
If an array has eight elements and we used the for loop header `for (int i = 7; i >= 0; i++)` to traverse it in reverse order, what is the result?
Suppose the array `arr` has a length of 7. If we want to traverse through its first 4 elements, which for loop header should be used?
If we want to traverse from the second to the seventh element of an array, inclusive, what should the for loop header be?
What is the advantage of using a for loop over a while loop for array traversal?
If an array has four elements and we used the for loop header `for (int i = 0; i <= 4; i++)` to traverse it, what is the result?
Suppose the array `arr` has 5 elements. If we want to traverse through its first 2 elements, which for loop header should be used?
How can we rewrite the following for loop as an enhanced for loop? int[] array = {5, 4, 10, 23, 15} for (int i = 0; i < array.length; i++) { System.out.println(array[i]); }
How can we rewrite the following for loop as an enhanced for loop? int[] array = {30, 2, 5, 6} for (int i = array.length-1; i >= 0; i--) { System.out.println(array[i]); }
Can we rewrite the following for loop as an enhanced for loop? boolean[] array = {true, false, false, true, false, true} for (int i = 0; i < array.length; i+=6) { System.out.println(array[i]); }
Which ArrayList methods do we use in the for loop implementation of traversing an ArrayList?
What happens if we try to access an index outside the range of an ArrayList when traversing it using a for loop?
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