def double(sequence):
    
    result = [ ]
    
    for element in sequence:
        
        result = result + [element * 2]
        
    return result

double([1, 10, 5])

[2, 20, 10]

double([-42, 0, 42])

[-84, 0, 84]

double ([24])

[48]

double ([])

[]

double()

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_2979/2608569975.py in <module>
----> 1 double()

TypeError: double() missing 1 required positional argument: 'sequence'

double([34, 8*8, -9, 53, 900])

[68, 128, -18, 106, 1800]

961907 + 560166

1522073

'work' + 'shop'

'workshop'

#double() multiplies given values by 2

x = [1, 2, 3 ]

double(x)

[2, 4, 6]

x

[1, 2, 3]

x = [4, 2, 3 ]

x

[4, 2, 3]

# the double() doubles up a given sequence and rendes a new sequence with those values doubled with the original values also remaining unchanged

double(5)

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_2979/1555949217.py in <module>
----> 1 double(5)

/tmp/ipykernel_2979/1416098114.py in double(sequence)
      3     result = [ ]
      4 
----> 5     for element in sequence:
      6 
      7         result = result + [element * 2]

TypeError: 'int' object is not iterable

double([1, 2], [3, 4])

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_2979/1017459985.py in <module>
----> 1 double([1, 2], [3, 4])

TypeError: double() takes 1 positional argument but 2 were given

def triple(sequence):
    
    result = [ ]
    
    for element in sequence:
        
        result = result + [element * 3]
        
    return result

triple([9, 8, 30])

[27, 24, 90]

def tenth(sequence):
    
    result = [ ]
    
    for element in sequence:
        
        result = result + [element / 10]
        
    return result

tenth([70,45,3])

[7.0, 4.5, 0.3]

def mis(sequence):
    
    result = [ ]
    
    for element in sequence:
        
        result = result + ['mis' + element]
        
    return result

mis(['lead'])

['mislead']