Question

Write a program that uses the binary search method to search an array.

Answer 1

To write a program that uses the binary search method to search an array, you can follow these steps: sort the array, calculate the mid index, compare the mid value with the target value, and repeat the process until the target value is found.

Step-by-step explanation:

To write a program that uses the binary search method to search an array, you can use the following steps:

1. First, sort the array in ascending order so that the binary search can be performed.
2. Calculate the mid index of the array.
3. If the value at the mid index is equal to the target value, return the index.
4. If the value at the mid index is greater than the target value, repeat the binary search process on the left half of the array.
5. If the value at the mid index is less than the target value, repeat the binary search process on the right half of the array.
6. Continue the binary search process until the target value is found or the search range becomes empty.

Here is an example of the binary search algorithm implemented in Python:

def binary_search(arr, target):
low = 0
high = len(arr) - 1
while low <= high:
mid = (low + high) // 2
if arr[mid] == target:
return mid
elif arr[mid] < target:
low = mid + 1
else:
high = mid - 1
return -1