Operators in Python¶
As any programming language Python supports all types of Operations. There are several categories of operators. For now we will cover Arithmetic and Comparison Operators.* Arithmetic Operators
- Addition (+)
- Subtraction (-)
- Multiplication (*)
- Division (/)
- Mod (%) returns reminder
+is also used for concatenation of strings.- Comparison Operators – typically return boolean value (True or False)
- Equals (==)
- Not Equals (!=)
- Negation (! before expression)
- Greater Than (>)
- Less Than (<)
- Greater Than or Equals To (>=)
- Less Than or Equals To (<=)
Tasks or Exercises¶
Let us perform some tasks to understand more about Python Data Types.
- Create variables or objects of int, float.
- Create 2 variables i1 and i2 with values 10 and 20 respectively. Add the variables and assign the result to res_i. Check the type of res_i.
In [1]:
i1 = 10
i2 = 20
In [2]:
res_i = i1 + i2
In [3]:
print(res_i)
30
In [4]:
type(res_i)
Out[4]:
int
- Create 2 variables f1 and f2 with values 10.5 and 15.6 respectively. Add the variables and assign the result to res_f. Check the type of f1, f2 and res_f.
In [5]:
f1 = 10.5
f2 = 15.6
res_f = f1 + f2
In [6]:
print(res_f)
26.1
In [7]:
type(f1)
Out[7]:
float
In [8]:
type(res_f)
Out[8]:
float
- Create 2 variables v1 and v2 with values 4 and 10.0 respectively. Add the variables and assign the result to res_v. Check the type of v1, v2 and res_v.
In [9]:
v1 = 4
v2 = 10.0
res_v = v1 + v2
In [10]:
print(res_v)
14.0
In [11]:
type(res_v)
Out[11]:
float
In [12]:
# question from the class
f1 = 10.1
f2 = '20.2'
res_f = f1 + float(f2)
# throws operand related to error as there is no overloaded function +
# between float and string
print(res_f)
30.299999999999997
- Create object or variable s of type string for value Hello World and print on the screen. Check the type of s.
In [13]:
s = "Hello 'World'"
print(s)
Hello 'World'
- Create 2 string objects s1 and s2 with values Hello and World respectively and concatenate with space between them.
In [14]:
s1 = 'Hello'
s2 = 'World'
print(s1 + ' ' + s2)
Hello World
In [15]:
s = '{s3} {s4}'
s3 = 'Hello'
s4 = 1
print(s.format(s3=s3, s4=s4))
Hello 1
In [16]:
print('The result is {} {}'.format(s3,s4))
The result is Hello 1
- Compare whether i1 and i2 are equal and assign it to a variable res_e, then check the type of it.
In [17]:
i1 = 10
i2 = 20
In [18]:
res_e = i1 < i2
# Feel free to try other operations
In [19]:
print(res_e)
True
In [20]:
type(res_e)
Out[20]:
bool