Why it is giving no output

Question

https://code.sololearn.com/cURC8oE58WHW/?ref=app

Answer 1

Here's your code corrected:

import java.util.Scanner;

class TestClass
{
static void fun(int arr[],int a)
{
int n=arr.length;
int l=0,u=n-1,m;

while(l<=u)
{
m=(l+u)/2;
if(arr[m]==a)
{
System.out.println("Found "+a+" at index "+m);
break;
}
else
{
if(arr[m]<a)
l=m+1;
else
u=m-1;
}
}
}

public static void main(String args[])
{
int n;
Scanner s=new Scanner(System.in);

int ar[]={1,23,45,67,68,82,87,88,89,96,123};
int find=88;
fun(ar,find);
}
}

Hth, cmiiw

Answer 2

I don't understand what is your code logic. But i guess you want to find certain number which is 88? However, in your code, 'm' never be equal with a. Because
1st: you set 'm' value to some value (l+u) divided by 2 which will get much smaller value.
2nd: I think 'm' can never be greater than arr[m], which is much greater than current 'm' value.
3rd: You didn't do enough incresement to 'u'.

That's all my guess. Here what i thought it should be. May be wrong. Sorry if i'm misunderstanding.
https://code.sololearn.com/cXf6fin4fsAU/?ref=app

Answer 3

thank u i got my error..