Hunt the bug Quiz

def is_prime(n):

    if n <= 1:

        return False

    for i in range(2, int(n ** 0.5) + 1):

        if n // i == 0:

            return False

    return True

print(is_prime(1999))  # Output: True

#find the error in this code to get this output ?

• Replace // with %

• Add +1 to the loop range

• Change <= 1 to < 1

• Return n instead of True

def factorial(n):

    result = 1

    for i in range(1, n):  

        result *= i

    return result

print(factorial(5))  # Output: 120

#find the error in this code to get this output ?

• Replace (1, n) with (1, n+1)

• Change result = 1 to result = 0

• Use range(n) instead of range(1, n)

• Return i instead of result

for i in range(1, 6):

    print(" ".join(str(x) for x in range(1, i)))  # Error introduced here

# Output:

1

1 2

1 2 3

1 2 3 4

1 2 3 4

#find the error in this code to get this output

• Replace str(x) with x

• Change " ".join to "".join

• Use range(1, i+1) instead of range(1, i)

• Change range(1, 6) to range(1, 5)

def is_palindrome(s):

    s = s.lower()

    s1 = s[::-1]

    if s == s1:

        return True

    return s1  # Error introduced here

print(is_palindrome("radar"))

#find the error in this code to get this output ?

• Remove the if condition entirely

• Change s[::-1] to s[:-1]

• Use return s instead of return True

• Replace return s1 with return False

def fibonacci(n):

    a, b = 0, 1

    for _ in range(n):  

        a, b = b, a + b

    return a

print(fibonacci(10))  # Output: 34

#find the error in this code to get this output ?

• Use range(n-1) instead of range(n)

• Replace a + b with a - b

• Change return a to return b

• Replace a, b = 0, 1 with a, b = 1, 1

d = {"a": 1, "b": 2}

d.update(["c", 3])  

print(d)  # Output: {'a': 1, 'b': 2, 'c': 3}

#find the error in this code to get this output ?

• Change d.update to d.append

• Replace ["c", 3] with {"c": 3}

• Use d["c"] = 3 instead of d.update

• Remove the update line

def transpose(matrix):

    return [[row[i] for row in matrix] for i in range(len(matrix))]  

matrix = [[1, 2], [3, 4], [5, 6]]

print(transpose(matrix))  # Output: [[1, 3, 5], [2, 4, 6]]

#find the error in this code to get this output ?

• Use matrix[i] instead of row[i]

• Remove for row in matrix

• Replace len(matrix) with len(matrix[0])

• Change return to print

def reverse_string(s):

    reversed_s = ""

    for char in s:

        reversed_s = reversed_s + char  

    return reversed_s

print(reverse_string("Python"))  # Output: nohtyP

#find the error in this code to get this output ?

• Use char + reversed_s instead of reversed_s + char

• Replace for char in s with for char in reversed(s)

• Return s instead of reversed_s

• Add [::-1] to the string s

 def remove_duplicates(lst):

    return list(lst)  

lst = [1, 2, 2, 3, 4, 4, 5]

print(remove_duplicates(lst))  # Output: [1, 2, 3, 4, 5]

#find the error in this code to get this output ?

• Add sorted around list(set(lst))

• Replace list(lst) with list(set(lst))

• Return lst instead of list(lst)

• Use a loop

def number_pyramid(n):

    for i in range(1, n + 1):

        print(i * i)  

number_pyramid(5)

#find the error in this code to get this output ?

• Add str() around i * i

• Use n * i instead of i * i

• Replace i * i with str(i) * i

• Remove the loop