python/data-structures/binarySerach.py at master · AllAlgorithms/python · GitHub

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def binSearch(a, x, low, high):

#Return True if target is found in indicated portion of a Python list.

#The search only considers the portion from data[low] to data[high] inclusive.

if low > high:

return False # interval is empty; no match

else:

mid = (low + high) // 2

if x == a[mid]: # found a match

return True

elif x < a[mid]:

# recur on the portion left of the middle

return binSearch(a, x, low, mid - 1)

else:

# recur on the portion right of the middle

return binSearch(a, x, mid + 1, high)

a = [5, 10, 15, 20, 25, 30, 40]

x = 20

low = 0

high = 6

result = binSearch(a, x, low, high)

if result:

print("The value ", x, " Found")

else:

print("The value ", x, " Not found")

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