Array:
An array is defined as a group that consists of similar data types.
- The array size must be specified by an “int” value and not long or short.
- In Java, all arrays are allocated dynamically.
- An array is always indexed, starting from 0.
Declaring an array reference and creating an array:
- To insert elements to an array, first an array has to be created by using new operator and then the reference variable is assigned.
- The syntax is as follows,
arrayRefVar = new elementType[arraySize]
- From the above statement it is clear that, an array is created using new elementType[arraySize] and then the reference to the newly created array is assigned to the variable arrayRefVar.
- It is possible to declare an array variable, create an array and assign the reference to a variable in a single statement itself.
The syntax will be as follows,
elementType[]arrayRefVar = new elementType[arraySize];
elementType arrayRefVar[]= new elementType[arraySize);
Example:
double myFile = new double[20];
The statement given above declares an array variable myFile and then creates an array that consists of 20 elements which are of the datatype double and at last assign the reference to myFile.
Explanation of Solution
b. Loop to display each element in the array:
//Class definition
public class Sample {
// define main function
public static void main(String[] args) {
// Declaration of string array
String[] planets = {"Mercury", "Venus", "Earth", "Mars"};
// Loop to read each element in the planets array
for(int i = 0; i<planets.length; i++)
// Display the contents of the planet array
System...
Explanation of Solution
c. Loop to display first character of the elements present in the array:
//Class definition
public class Sample {
// define main function
public static void main(String[] args) {
// Declaration of string array
String[] planets = {"Mercury", "Venus", "Earth", "Mars"};
// Loop to read each element in the planets array
for(int i = 0; i<planets.length; i++)
// Display the contents of the planet array
System.out.println(planets[i]...
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
- Palindrome Checkercreate a JavaScript program that checks if phrasesentered by the user are palindromes. A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward, such as “SIR”,“raceBIKE”, “Never odd or even”, “20/1/20”. The program should prompt the user to typein a phrase that is at least three characters long, and then tell the user whether the phrasewas a palindrome. Note, the decision should be based solely on letters and numericaldigits, and so it should not consider other characters, such as spaces or exclamationmarks, even though these might be entered by the user. when checking palindromes.A. Select your test data with care. Both palindromes and non-palindromes would be included in this. Provide examples that are text, numeric, and mixed; ignore any additional characters and spaces; andB. Ask the user for the word and then read their input. To verify that their input string has been read correctly, test this by displaying…arrow_forward//write code that loops through the two variables returns an array ['2 is zwei', '3 is drei', '4 is vier', '5 is fünf', '6 is sechs']// example:// return: ['2 is zwei', '3 is drei', '4 is vier', '5 is fünf', '6 is sechs']// hint: use Array.forEach, Array.map or a for loopfunction germanNumbers(){ const cardinalNumbers = [2,3,4,5,6]; const germanNumbers = ['zwei', 'drei', 'vier', 'fünf', 'sechs']; } // write code that returns an array of ONLY prime numbers that are in the array numbers// example: // return [2, 3, 5, 7, 11, 13]// hint use: Array.filterfunction returnPrimeNumbers(){ const numbers = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]; }arrow_forwardAny loop statement can be used to traverse an array. True or Falsearrow_forward
- Rest of code in image / This is a bad programming style since it is using goto. // This is an spagetti code and not working.// Use function to display menu, and display game rules,// Use different color for text display.// fix it so it works any way you like./*HANDLE screen = GetStdHandle(STD_OUTPUT_HANDLE); // Write 16 lines in 16 different colors. for (int color = 0; color < 16; color++) { SetConsoleTextAttribute (screen, color); cout << " Hello World!" << endl; Sleep(400); // Pause between lines to watch them appear } // Restore the normal text color) SetConsoleTextAttribute(screen, 7);*/#include <iostream>#include <windows.h>using namespace std;int main(){ //textbackground(WHITE); //textcolor(RED); system("cls"); char ch, a[20], ch2; int num = 100, rnum, guess, count, ch1, c = 0; cout << "**********************************************************"<<endl; cout << "*…arrow_forwardquestion 2arrow_forwardComplete the loop so that it displays all mountains that are over 15000 feet. The blank ____ on the code below indicates where your statement will be placed. var mountains = ["Mount Everest" : 29029, "Nanga Parbat" : 26660, "Kanlaon" : 8087, "Pico de Orizaba" : 18491, "Sabalan" : 15784]for ____ { if elevation > 15000 { print("\(mountain): \(elevation) feet.") } }arrow_forward
- Assignment1B: Grocery List. When shopping for groceries, it's helpful to know how much it's going to cost you in advance - this helps you avoid an embarrassing situation in the check-out line. For this assignment, you're going to write a simple program that asks you for the name, quantity, and price of two grocery store items. It will then generate a grocery list for you, complete with the total price. (Later in the semester, we'll learn how to make a program that can create much larger lists, but we'll start small here). Call the file Assignment1B (with a file extension of .cpp, .cs or .java) Sample Output: What're you buying? Ice Cream How many? 2 What do they cost? 2.25 What else're you buying? Celery How many? 5 What do they cost? 1.74 Your list: Ice Cream (2) $2.25 ($4.50 total) Celery (5) $1.74 ($8.7 total) Total Cost: $13.2arrow_forwarddo the following: - Create an array of the following temperature readings: 36, 5, 10, 24, 40, 31 - use a loop to find the sum of the elements in the array. -find the average of the numbers. if the average is more than 30 display the message "TOO HOT" on screen otherwise check if the average is between 15 and 30 display the message "MODERATE" otherwise display the message "TOO COLD".arrow_forwardWrite the countVowels function which counts the number of vowels using the string class as follows: int countVowels(const string& s) Write a test program that prompts the user to enter a string, invokes the countVowels function and displays the total number of vowels in the string.arrow_forward
- EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENTProgramming with Microsoft Visual Basic 2017Computer ScienceISBN:9781337102124Author:Diane ZakPublisher:Cengage LearningMicrosoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,