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#Author: OMKAR PATHAK

#This programs give an example of binary search algorithm

def binarySearch(target, List):

'''This function performs a binary search on a sorted list and returns the position if successful else returns -1'''

left = 0 #First position of the list

right = len(List) - 1 #Last position of the list

global iterations

iterations = 0

while left <= right: #U can also write while True condition

iterations += 1

mid = (left + right) // 2

if target == List[mid]:

return mid

elif target < List[mid]:

right = mid - 1

else:

left = mid + 1

return -1

if __name__ == '__main__':

List = [1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14]

target = 2

ans = binarySearch(target, List)

if(ans != -1):

print('Target found at position:',ans,'in',iterations,'iterations')

else:

print('Target not found')