newbie Question.....

this is my first time using Java.... self Study only.. and i have a problem in looping can any one correct me... or give me sample code...

Scanner user = new Scanner(System.in);
int loopVal;
int end_value = 11;
int total;
int num = 10;

for (loopVal = 1; loopVal < end_value; loopVal++){
total = loopVal * num;
System.out.println(+loopVal +"i want to insert a number using a string that can times to my loopVal "+" Times "+" "+" = " +total);
}

}
}



Thanks :o

Is your problem loop logic or how to extract an integer from a string? Maybe a little of both?

Please take your question out of the middle of your code and restate it more clearly.

Please Edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

The way that java Strings work is: If you add a numeric variable to a String (with the + operator), the value of the numeric variable is converted to a String and the converted String's value is concatenated with the original String value to form a new single String.

And then...

If you add a String to a String (with the + operator), their values are concatenated to form a new single String.

Furthermore...

If you add a bunch of strings (with + operators), all of their values are concatenated to form a new single String.

Code java:

---

public class Z
{
    public static void main(String [] args)
    {
        int x = 42;
        System.out.println("The answer is " + x + ".  Now what was the question?");
    }
}

---

Output:

The answer is 42. Now what was the question?



Cheers!

Z

Quote:

---

Originally Posted by Zaphod_b

The way that java Strings work is: If you add a numeric variable to a String (with the + operator), the value of the numeric variable is converted to a String and the converted String's value is concatenated with the original String value to form a new single String.

And then...

If you add a String to a String (with the + operator), their values are concatenated to form a new single String.


Furthermore...

If you add a bunch of strings (with + operators), all of their values are concatenated to form a new single String.

Code java:

---

public class Z
{
    public static void main(String [] args)
    {
        int x = 42;
        System.out.println("The answer is " + x + ".  Now what was the question?");
    }
}

---

Output:

The answer is 42. Now what was the question?



Cheers!

Z

---

My problem is i want to time the loopVal to a User entry.. is it possible to use this kind of code??

total = loopVal * input number here;

Quote:

---

Originally Posted by Haseo

My problem is i want to time the loopVal to a User entry.. is it possible to use this kind of code??

total = loopVal * input number here;

---

Sure. Why not simply get the user's input and then have your loop code immediately after you get the user's input. Where exactly are you stuck?

Quote:

---

Originally Posted by curmudgeon

Sure. Why not simply get the user's input and then have your loop code immediately after you get the user's input. Where exactly are you stuck?

---

here's my code can you correct me....

Code java:

---

        int end_value = 11;
        int loopVal;
        int total;
 
        String number;
        System.out.println();
        number = user.next();
 
      for(loopVal = 1; loopVal < end_value; loopVal++){
 
 
          System.out.println("Loop Value "+loopVal);
      }

---

I try to use this code before System.out.println...
total = loopVal * number; <<<< Error..

1. what error do you see? Please post the whole error message.
2. The Scanner#next() method returns a String when you want to get an int, and that won't work for you.
3. Scanner has a better method for getting an int. Have a look at the Scanner API and see if you can figure out what it is.
4. You're declaring number as a String variable. Don't you want this to be an int variable instead?

Quote:

---

Originally Posted by curmudgeon

1. what error do you see? Please post the whole error message.
2. The Scanner#next() method returns a String when you want to get an int, and that won't work for you.
3. Scanner has a better method for getting an int. Have a look at the Scanner API and see if you can figure out what it is.
4. You're declaring number as a String variable. Don't you want this to be an int variable instead?

---

i try another some code like this.

Code java:

---

    int i;
    int n = 10;
    int sum;
 
    for (i = 0; i < n; i++){
        sum = i * n;
        System.out.println(i + " Times " + n +" = "+ sum);

---

output:

0 Times 10 = 0
1 Times 10 = 10
2 Times 10 = 20
3 Times 10 = 30
4 Times 10 = 40
5 Times 10 = 50
6 Times 10 = 60
7 Times 10 = 70
8 Times 10 = 80
9 Times 10 = 90
before > sum = i * n; <<< i wan't to * any number that the user input any number but my problem is is't possible? ... int * string??

now > total = user.nextint(); System.out.println(loopVal + " Times = " + loopVal * total); << it work but the problem is it's not looping

Code java:

---

System.out.println("Enter A Number");
 
   for (i = 1; i < n; i++){
       sum = conin.nextInt();
       System.out.println(i + " total = " + i * sum);

---

output:
Enter A Number
10
1 total = 10 << problem not continues looping....

I think you miss initial value of n variable ....