I need your help please .,java language

Question

I want to reverse a char array
And the word is given by the user.
How can I read the char array from a user.
https://code.sololearn.com/cZPrQL38O9Vj/?ref=app

Answer 1

amal 01 use System.out.print(arr[i] ); for output the string without line break

Answer 2

import java.util.Scanner;

public class Program
{
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String text = scanner.nextLine();
char[] arr = text.toCharArray();

for(int i=arr.length-1;i>=0;i--){
System.out.println(arr[i]);

}
}}

Answer 3

amal 01 show your try
Attach your file here
Add a MWE

https://www.sololearn.com/post/75089/?ref=app

Answer 4

amal 01

Everything works but just a small improvement in the for loop

for (int i = arr.length-1; i>=0; i--) {
Sopln(arr[I]) ;
} // you forgot this end bracket

Answer 5

in the condition of the loop you should:
i>=0
also you forget this " } "

Answer 6

How you read charecters? As a string or individual chars?
If later one, use a loop to read char by next().charAt(0) method of scanner object.

Try and post that tried code of unsolved....

Answer 7

amal 01 i already given about it in my 2nd post..
May you not noticed.
System.out.println adds line break. While System.out.print() does not.
And use i>=0 condition.

Answer 8

Jayakrishna🇮🇳
Thank you so much .
I did not noticed it.

Answer 9

Inside for loop use i >= 0 then. Resolved

Answer 10

amal 01 create a new question thread for your new question don't post all your questions in one post.

This way you can get help.

Answer 11

amal 01
Strings are immutable (you cannot modify).
String Buffer is mutable version of strings. You can modify original. It has already answered lot times so search bar will give more answers. Creating new will become dublicate. Use search bar.
Hope it helps

Edit : for more info :
https://www.sololearn.com/discuss/724152/?ref=app
https://www.sololearn.com/discuss/577260/?ref=app
https://www.sololearn.com/discuss/141079/?ref=app
https://www.sololearn.com/discuss/2117193/?ref=app
https://www.sololearn.com/discuss/536275/?ref=app
https://www.sololearn.com/discuss/93036/?ref=app
https://www.sololearn.com/discuss/2100143/?ref=app

Answer 12

amal 01 you forgot to add a link

Answer 13

amal 01 scanner.next().charAt(0); reads a single charecter.
Ingores next charecters until spaee..

Answer 14

Hasna
The problem is that of I entered for example amal.
The output should be lama.
So need an array of characters starting from the lenght -1 .

Answer 15

hi amal 01 in your code:

in line 11 read array until index 0
change i>0 to i>=0

in line 12 change println to print for a single line

and line 13 close cicle for with }

Answer 16

Consider the Java program below, and then answer the questions that follow
import java.util.Scanner;
public class question2{
Public static void main(String [] args){
Scanner in = new Scanner(System.in);
System.out.println(“Enter an Integer number”);
int n = in.nextInt();
int s = 0, i = 1;

do{
s + = Math.pow(i,2);
i++;
}
while(i <=n);

System.out.println(“Output = “+ s);
}
}
Explain what the Java program is doing 5 marks
Hence, give the Java class an appropriate name 2 marks
If n = 5, what will be the output from the program (show your working) 8 marks
Modify the program in 2(a) above to calculate S given that
n
S = ∑ i 3
i=i

I need someone to help with the answer to this question please?

Answer 17

Krish
Here is my code try.
I want to read a char array from the user but there isn't any way that I know.

Answer 18

Jayakrishna🇮🇳
As an individuals chars
Can I read char as a scanner object .
How so.???

Answer 19

Krish a link of what

Answer 20

amal 01 It works but Edit to this
for(int i=arr.length-1;i>=0;i--) //{ remove this brace.
System.out.print(arr[i]);

Condition use i>=0
And use System.out.print() method

Edit :
(to not put line break).