Linear Search
def LinearSearch(array, n, k):
    for j in range(0, n):
        if (array[j] == k):
            return j
    return -1
 
array = [1, 3, 5, 7, 9]
k = 7
n = len(array)
result = LinearSearch(array, n, k)
if(result == -1):
    print("Element not found")
else:
    print("Element found at index: ", result)
