《python核心编程》

Title: Python Core Programming Exercise Solutions

Exercise 1:

Write a Python program to print "Hello, World!".

Solution:

```python

print("Hello, World!")

```

Exercise 2:

Write a Python program to add two numbers.

Solution:

```python

num1 = 5

num2 = 3

sum = num1 num2

print("The sum of {0} and {1} is {2}".format(num1, num2, sum))

```

Exercise 3:

Write a Python program to find the square root of a number.

Solution:

```python

import math

num = 16

sqrt_num = math.sqrt(num)

print("The square root of", num, "is", sqrt_num)

```

Exercise 4:

Write a Python program to check if a number is positive, negative or zero.

Solution:

```python

num = 5

if num > 0:

print("The number is positive")

elif num < 0:

print("The number is negative")

else:

print("The number is zero")

```

Exercise 5:

Write a Python program to find the factorial of a number.

Solution:

```python

def factorial(n):

if n == 0:

return 1

else:

return n * factorial(n1)

num = 5

print("The factorial of", num, "is", factorial(num))

```

Exercise 6:

Write a Python program to check if a number is prime or not.

Solution:

```python

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

num = 7

if is_prime(num):

print(num, "is a prime number")

else:

print(num, "is not a prime number")

```

Exercise 7:

Write a Python program to print the Fibonacci sequence.

Solution:

```python

def fibonacci(n):

fib_seq = [0, 1]

for i in range(2, n):

fib_seq.append(fib_seq[i1] fib_seq[i2])

return fib_seq

num_terms = 10

print("Fibonacci sequence:", fibonacci(num_terms))

```

Exercise 8:

Write a Python program to find the sum of digits in a number.

Solution:

```python

def sum_of_digits(n):

sum = 0

while n > 0:

digit = n % 10

sum = digit

n //= 10

return sum

num = 12345

print("The sum of digits in", num, "is", sum_of_digits(num))

```

Exercise 9:

Write a Python program to reverse a number.

Solution:

```python

def reverse_number(n):

rev = 0

while n > 0:

digit = n % 10

rev = rev * 10 digit

n //= 10

return rev

num = 12345

print("The reverse of", num, "is", reverse_number(num))

```

Exercise 10:

Write a Python program to find the factorial of a large number.

Solution:

```python

import math

num = 100

fact = math.factorial(num)

print("The factorial of", num, "is", fact)

```

These are solutions to some core Python programming exercises. Make sure to understand the concepts behind each solution and try to solve similar problems on your own to reinforce your understanding. Happy coding!