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.
i1 = 10
i2 = 20
res_i = i1 + i2
print(res_i)
30
type(res_i)
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.
f1 = 10.5
f2 = 15.6
res_f = f1 + f2
print(res_f)
26.1
type(f1)
float
type(res_f)
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.
v1 = 4
v2 = 10.0
res_v = v1 + v2
print(res_v)
14.0
type(res_v)
float
# 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.
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.
s1 = 'Hello'
s2 = 'World'
print(s1 + ' ' + s2)
Hello World
s = '{s3} {s4}'
s3 = 'Hello'
s4 = 1
print(s.format(s3=s3, s4=s4))
Hello 1
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.
i1 = 10
i2 = 20
res_e = i1 < i2
# Feel free to try other operations
print(res_e)
True
type(res_e)
bool