I am suppose to create a pyramid and multiply each number by two until it reach the middle then divide by two such as shown in example below.
However after writing my code I am unable to have the numbers double (i*2) then once it reaches the center it divides by two until the it becomes 1
My output:
package question5;
public class Pyramid {
public static void main(String[] args) {
int x = 5;
int rowCount = 1;
System.out.println("Here Is Your Pyramid");
//Implementing the logic
for (int i = x; i > 0; i--)
{
//Printing i*2 spaces at the beginning of each row
for (int j = 1; j <= i*2; j++)
{
System.out.print(" ");
}
//Printing j value where j value will be from 1 to rowCount
for (int j = 1; j <= rowCount; j++)
{
System.out.print(j+" ");
}
//Printing j value where j value will be from rowCount-1 to 1
for (int j = rowCount-1; j >= 1; j--)
{
System.out.print(j+" ");
}
System.out.println();
//Incrementing the rowCount
rowCount++;
}
}
}
this is the weird output of it
This is working... You can use math.pow method.
public class test {
public static void main(String[] args) {
int x = 5;
int rowCount = 1;
System.out.println("Here Is Your Pyramid");
//Implementing the logic
for (int i = x; i > 0; i--)
{
//Printing i*2 spaces at the beginning of each row
for (int j = 1; j <= i*2; j++)
{
System.out.print(" ");
}
//Printing j value where j value will be from 1 to rowCount
for (int j = 0; j <= rowCount-1; j++)
{
System.out.printf("%2d", (int)Math.pow(2, j));
}
//Printing j value where j value will be from rowCount-1 to 1
for (int j = rowCount-1; j >= 1; j--)
{
System.out.printf("%2d", (int)Math.pow(2, j-1));
}
System.out.println();
//Incrementing the rowCount
rowCount++;
}
}
}
Right now you're outputting j, a number from 1 to 5. You want to output 2j-1 instead, which is easy: 1 << (j - 1).
You also need to right-adjust the number. Your print statement then becomes:
System.out.printf("%4d", 1 << (j - 1));
Related
for a school project, I am trying to make an inverted half pyramid
my code is currently this
public static void main(String[] args) {
int rows = 5;
for(int i = rows; i >= 1; --i) {
for(int j = 1; j <= i; ++j) {
System.out.print(j + " ");
}
System.out.println();
}
}
with this output:
12345
1234
123
12
1
desired output:
54321
=4321
==321
===21
====1
Update (based on the updated requirement):
You need a loop to print the = equal to (rows - row number) times.
public class Main {
public static void main(String[] args) {
int rows = 5;
for (int i = rows; i >= 1; --i) {
for (int j = i; j < rows; j++) {
System.out.print("=");
}
for (int j = i; j >= 1; --j) {
System.out.print(j);
}
System.out.println();
}
}
}
Output:
54321
=4321
==321
===21
====1
Original answer:
Your inner loop should be
for (int j = i; j >= 1; --j)
i.e. for each row, it should start with the row number (i.e. i) and go down up to 1.
It is straight forward you will have to change to things: your inner loop and you will have to move println statement inside the loop
//code
public static void main(String[] args){
int rows = 5;
for (int i = rows; i >= 1; --i){
for(int j = i; j >= 1; --j)
System.out.print(j + " ");
System.out.println();
}
}
instead of getting a full triangle with 5 lines of "*" how do I replace every second line with a blank line, e.g. to look like this
5
555
55555
This is my code:
for(int i = 0; i < 5; i++) {
for(int j = i; j < 5; j++) {
System.out.print(" ");
}
for(int k = 0; k <= (i*2); k++) {
System.out.print("5");
}
System.out.println();
}
you need small modification in your code and you can get what you want.
for(int i = 0; i < 5; i++) {
for(int j = i; j < 5; j++) {
System.out.print(" ");
}
for(int k = 0; k <= (i*2); k++) {
if(i%2==0)
System.out.print("*");
}
System.out.println();
}
check it out.
Just test for i % 2
for(int i = 0; i < 5; i++) {
for(int j = i; j < 5; j++) {
System.out.print(" ");
}
for(int k = 0; k <= (i*2); k++) {
System.out.print(i % 2 == 0 ? "*" : " ");
}
System.out.println();
}
edit
If you want to print 5 instead or * then modify the code to use 5
Check this:
int num= 5; // 'num' denotes the number of lines
int numOfSpaces;
for(int i = 1; i <= num; i++) {
if( i%2 != 0) // checks whether the line number is odd. If odd, prints '*'
{
numOfSpaces = (num-i) / 2; // find the number of blank spaces
for(int j = 1; j <= numOfSpaces; j++) {
System.out.print(" ");
}
for(int k = 1; k <= i; k++) { // number of '*'s to be printed = current line number = i
System.out.print("*");
}
System.out.println();
}
else{
System.out.println(); // leaves every second line blank (ie.,if line number is even.)
}
}
//try this code. It may help you to achieve your output
[Check screen shot for the output of the below code][1]
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5 - i; j++)
{
System.out.print(" ");
}
for (int k = 0; k <= i; k++)
{
if(i%2!=0)
{
System.out.print(" ");
}
else{
System.out.print("* ");
}
}
System.out.println();
}
The Code below is Working now.
A simple if condition will solve your problem. Just check if the
value of i is divisible by 2. If it is true then print a
blank line. Else Print * and you are done!
* will be printed on 1st, 3rd and 5th lines.
Blank Space will be printed on 2nd and 4th lines.
public class PrintPattern{
public static void main(String []args){
int lineNo=0; // New Variable for Line Number (Can Use variable 'i' also)
for(int i = 0; i < 5; i++) {
lineNo++;
for(int j = i; j < 5; j++) {
System.out.print(" ");
}
if(lineNo%2!=0){
for(int k = 0; k <= (i*2); k++)
System.out.print('*'); // Will print '*' (or '5') Sequence for Odd Lines - 1st, 3rd, 5th Lines
System.out.println();
}
else
System.out.println();// Will print Blank Line for Even Lines - 2nd and 4th Lines
}
}
}
Try this
for(int i = 0; i < 5; i++) {
for(int j = i; j < 5; j++) {
System.out.print(" ");
}
for(int k = 0; k <= (i*2); k++) {
System.out.print("5"); //Use 5 instaed of * to draw
}
System.out.println();
System.out.println(); //This one will solve your problem
}
Output will be:
5
555
55555
5555555
555555555
I think that you can just enter one more print statement inside the loop:
for(int i = 0; i < 5; i++) {
System.out.println();
for(int j = i; j < 5; j++) {
System.out.print(" ");
}
for(int k = 0; k <= (i*2); k++) {
System.out.print("*");
}
System.out.println();
}
Output
*
***
*****
*******
*********
a pyramid of numbers thats core is increasing by one which would be seen horizontally as 12345.
I figured out this code
but its not as the img I shown up there ^
the code I wrote is:
int rowCount = 1;
for (int i = 6; i > 0; i--)
{
for (int j = 1; j <= i*2; j++)
{
System.out.print(" ");
}
for (int j = 1; j <= rowCount; j++)
{
System.out.print(j+" ");
}
for (int j = rowCount-1; j >= 1; j--)
{
System.out.print(j+" ");
}
System.out.println();
rowCount++;
}
}
`
I am trying to System.out.print() a diamond out of *'s. So far I have spent a good 5 hours on trying to figure out how to reverse print the bottom triangle of the diamond.
I can worry about the spacing to complete the diamond later. (I have it worked for the most part).
If someone could explain to me what I am doing wrong and how the right way works I would greatly appreciate it.
private static void diamond()
{
int numLines = 0;
System.out.println("How many lines would you like in the Diamond?");
numLines = scan.nextInt();
if (numLines / 2 == 0) //if number is even, make odd.
{
numLines++;
}
for(int i = 0; i <= numLines ; i++) // Controls #Lines
{
if(i <= numLines / 2)
{
for(int j = 0; j < i * 2 - 1; j++) // Controls #Stars small upright triangle
{
System.out.print("*");
}
}
else
{
for(int k = numLines; k > i / 2; k--) // Controls # of spaces
{
System.out.print("*");
}
/*for(int j = numLines/2 - i, l = i; l > j; j++) // Controls #Stars small upright triangle
{
String stars = "*";
System.out.print(stars);
}*/
}
System.out.println("");
}
}
`
What happens to your attempt is that you loop through the half (of the lines) of your diamond [the number of lines in second/first half] times.
You'd want to do a if-statement each loop, not an if and a for in each loop
Probably you want this
Just adjust it for user input values
public static void main(String[] args) {
System.out.print("Reverse diamond: \n");
for (int i = 1; i < 10; i += 2) {
for (int j = 0; j < 9 - i / 2; j++)
System.out.print(" ");
for (int j = 0; j < i; j++)
System.out.print("*");
System.out.print("\n");
}
System.out.print("\n\nDiamond from starts: \n");
for (int i = 7; i > 0; i -= 2) {
for (int j = 0; j < 9 - i / 2; j++)
System.out.print(" ");
for (int j = 0; j < i; j++)
System.out.print("*");
System.out.print("\n");
}
}
output:
I have a homework for college. I have to draw a rectangle with nested for loop that looks like this:
1
234
34567
4567890
567890123
for now I managed to do this:
public class DN2 {
public static void main(String[] args){
trikotnik(8);
}
static void trikotnik(int n){
for (int i = 1; i <= n; i++) {
for (int j = n; j > i; j--) {
System.out.print(" ");
}
for (int j = 1; j > 1; j--) {
System.out.print(j + " ");
}
for (int j = 1; j <= i; j++) {
System.out.print(j + " ");
}
System.out.println();
}
}
}
To draw a triangle, at most you need two nested loops, one to deal with rows and another to deal with columns.
for (int y=0; y<5; y++)
{
for (int x=0; x<9; x++)
{
//write character that should be at (x,y), i.e. (column, row)
}
}
You haven't specified anything about which numbers to should be printed where so I'm not going to guess at an algorithm but
for (int j = 1; j > 1; j--)
is saying, set j to 1 and while it is greater than one, decrement it. As you've set it to one, it can never be greater than one so this loop is skipped completely