Apply Binary search on Array data structure by R4R Team

Array:
Array is the collection of different values having same data type.
-We have a integer Array that having all integer values.
-Character array is known as String.

Searching in Array:
Possible Search in Array is
1. Linear search
2. Binary search

Binary search:
It is used to find the element in the array.
-Applicable only on Sorted data.

program-

#include < stdio.h>
int main()
{
int i,first=0, last, middle,n, num, arr[100];
printf("Enter number of elements\n");
scanf("%d",&n);
printf("Enter %d elements in array\n", n);
//Input in array
for(i= 0;i< n;i++)
scanf("%d",&arr[i]);
printf("Enter value to find\n");
scanf("%d", &num);
last = n - 1;
middle = (first+last)/2;
while(first<=last) {
if(arr[middle]< num)
first = middle + 1;
else if (arr[middle]==num) {
printf("%d found at location %d.n",num, middle+1);
break;
}
else
last = middle - 1;
middle = (first + last)/2;
}
if (first > last)
printf("Not found! %d isn't present in the list\n", num);
return 0;
}


output-

Enter number of elements
6
Enter 6 elements in array
1 2 3 4 5
Enter value to find
2
2 found at location 2




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