In [1]:
l=[7,4,2,6]
In [3]:
for num in l:
    print(num)

7
4
2
6
In [4]:
for num in l:
    print(num*2)

14
8
4
12
In [6]:
def mean(sequence):
    total=0
    for element in sequence:
        total=total+element
    return total/len(sequence)
In [7]:
short=[5,5,5,5]
In [8]:
mean(short)
Out[8]:
5.0
In [9]:
short=[-5,0,5]
In [10]:
mean(short)
Out[10]:
0.0
In [11]:
x=5
In [12]:
type(x)
Out[12]:
int
In [13]:
type(5)
Out[13]:
int
In [14]:
type(7)
Out[14]:
int
In [15]:
type(36)
Out[15]:
int
In [21]:
type(5.8)
Out[21]:
float
In [22]:
type([1,2,3])
Out[22]:
list
In [23]:
type('hello world')
Out[23]:
str
In [24]:
'hello'+'world'
Out[24]:
'helloworld'
In [25]:
'hello'+' '+'world'
Out[25]:
'hello world'
In [28]:
a='hello'
b='world'
c=' '
In [29]:
a+c+b
Out[29]:
'hello world'
In [30]:
len('hello world')
Out[30]:
11
In [31]:
len([1,2,3])
Out[31]:
3
In [35]:
len(['hello','world'])
Out[35]:
2
In [36]:
len(5)

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_6819/4108502181.py in <module>
----> 1 len(5)

TypeError: object of type 'int' has no len()
In [37]:
2+'hello'

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
/tmp/ipykernel_6819/2596768515.py in <module>
----> 1 2+'hello'

TypeError: unsupported operand type(s) for +: 'int' and 'str'
In [40]:
volume=[4.0,2.0,3.0,5.5]
result=[]
for element in volume:
    result=result+[element*2]
result
Out[40]:
[8.0, 4.0, 6.0, 11.0]
In [41]:
result=[]
result
Out[41]:
[]
In [43]:
result=result+[4.0]
result
Out[43]:
[4.0]
In [45]:
result=result+[2.0]
result
Out[45]:
[4.0, 2.0, 2.0]
In [48]:
result=result+[3.0]
result
Out[48]:
[4.0, 2.0, 2.0, 3, 0, 5.5, 3.0]
In [49]:
result=result+[5.5]
result
Out[49]:
[4.0, 2.0, 2.0, 3, 0, 5.5, 3.0, 5.5]
In [51]:
result=[]
result=result+[4.0]
In [52]:
words='hello','world'
In [53]:
double(words)

---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
/tmp/ipykernel_6819/2412218211.py in <module>
----> 1 double(words)

NameError: name 'double' is not defined
In [ ]: