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Added Binary Search algorithm in Python #457

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28 changes: 28 additions & 0 deletions Algorithms/Searching/BinarySearch.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,28 @@
def binary_search(l, key):
low = 0
mid = len(l) // 2 #mid stores the middle index of the list
high = len(l) - 1

while low <= high:
if key == l[mid]:
print("Number found at index", mid)
quit()
else:
if key < l[mid]:
high = mid - 1 #adjusts the range to the lower half
else:
low = mid + 1 #adjusts the range to the upper half

mid = (low + high) // 2 #finds the new middle of the range

print("Number not found")

n= int(input("Enter size "))
l = []
for i in range(n):
num = int(input("Enter number "))
l.append(num)

l.sort()
key = int(input("Enter the number to search for "))
binary_search(l, key)
19 changes: 19 additions & 0 deletions Algorithms/Searching/LinearSearch.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,19 @@
numbers = []
flag = False
number_of_values = int(input("The number of values to enter "))

for i in range(number_of_values):
x = int(input("Enter a number "))
numbers.append(x)

value = int(input("Enter a number to seach for"))

for i in range(len(numbers)): #will iterate over each index
if numbers[i] == value:
flag = True #indicates that the value is found
break

if flag == True:
print(value, "found at ", (i+1), "position")
else:
print("Number not found")