Unit-2

7) #Function that returns multiple values 
def calculate_operations(a, b):  
    return a + b, a - b, a * b
num1, num2 = 10, 5
results = calculate_operations(num1, num2)
print("Sum:", results[0])
print("Difference:", results[1])
print("Product:", results[2])


8) #Function with default arguments
def power(base=2, exponent=3):
    return base ** exponent
print("Default power (2^3):", power())
print("Power with base 4 (4^3):", power(4))
print("Power with base 5 and exponent 2 (5^2):", power(5, 2))


9) #length of a string
def string_length(input_string):
    count = 0
    for char in input_string:
        count += 1
    return count
string = "Ravali"
length = string_length(string)
print(f"The length of the string is: {length}")


10) #substring is present in string or not
def subStr(s, sub): 
    return sub in s
print(subStr('RavaliKoppisetti', 'Ravali'))


11) #addition,insertion,slicing
lst = [1, 2, 3, 4, 5]
lst.append(6)
print("After addition:", lst)
lst.insert(2, 9)
print("After insertion:", lst)
print("After slicing:", lst[1:4])


12) #5built in functions
lst = [1, 2, 3, 4, 5, 6, 3, 9]  
print("Count:", lst.count(9))
print("Index:", lst.index(3))
lst.sort()
print("Sort:", lst)
lst.reverse()
print("Reverse:", lst)
lst.extend([7, 8, 9])
print("Extend:", lst)