Display the smallest number from an input in Java

Question

For example:

If the input is 550 the answer is 0
If the input is 32847923846 the answer is 2

The length of the input is variable.

I have tried arraylist and buffered reader class but i am not being able to get because the input's length is variable

if the length is variable... why not make the length of your array variable? Or use a `List`? — Dragondraikk, Jun 02 '15 at 12:38
i used it but still there is error if you can help? how to use list ? — ak47_kalani, Jun 02 '15 at 12:39
What is the error? Did you even bother looking up `List`? The official Java Documentation is a great source. — Dragondraikk, Jun 02 '15 at 12:42

score 2 · Accepted Answer · edited May 23 '17 at 12:21

2

Step one, round the number down to the nearest 10, as seen here.

int round(double i, int v){
    return Math.floor(i/v) * v;
}

And then minus this number from the original.

int value = 34554674;
int roundedDown = round(value, 10);

int smallest = value - roundedDown;

As seen by this Ideone.

edited May 23 '17 at 12:21

Community

1
1

answered Jun 02 '15 at 12:45

christopher

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If I understand OP correctly he looks for the smallest digit. Take a look at his `32847923846` example, the expected output is `2` and not `6`. The expected output for `123` would be `1`. But he accepted this answer, so whatever. – Sascha Wolf Jun 02 '15 at 13:57
1

Ah yeah.. I must have misread, but yeah you're correct. Either he/she will comment and ask for a correction or this is one of those times where two wrongs made a right. – christopher Jun 02 '15 at 14:19
Or he/she will submit a wrong solution for his/her homework. I would be fine with that. – Sascha Wolf Jun 02 '15 at 14:40
2

I feel like some sort of evil genius. – christopher Jun 02 '15 at 15:08
1

or evil idiot since it turns out I can't even read properly. – christopher Jun 02 '15 at 15:08

score 1 · Answer 2 · answered Jun 02 '15 at 12:39

1

Simple... Change your int i =1234; value to char[] using this...

char[] chars = ("" + i).toCharArray();

after this use a loop to find the min value and print that...

answered Jun 02 '15 at 12:39

CoderNeji

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3
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31

How to find the min value ? Just like integer . – ak47_kalani Jun 02 '15 at 12:43
yes its the same way – CoderNeji Jun 02 '15 at 12:44

score 0 · Answer 3 · answered Jun 02 '15 at 12:41

If input is only 1 line:

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
char[] c = in.readLine().toCharArray();
char result = c[0];
for (char i : c) result = Math.min(result, i);

or if you have long integer:

long l;
// ...
char[] c = String.valueOf(l).toCharArray();
char result = c[0];
for (char i : c) result = Math.min(result, i);

Display the smallest number from an input in Java

3 Answers3