Variables

Basic Variable types syntax

• python automatically detect our variable type depending on value assigned
• Also variable names are case sensitive so a and A is considered as two separate variables

# string
a = "Vivek"
# integer
b = 105
# float
c = 10.23
# boolen
d=True
# null
e=None

# printing variables
print(a)
print(b)
print(c)
print(d)
print(e)

# printing variable types
print(type(a))
print(type(b))
print(type(c))
print(type(d))
print(type(e))

Immutable Data Type

• Immutable Object can’t change it’s state
• types
  • int
  • float
  • complex
  • string
  • tuple set

Tuple

a=(10,"Hello",4.4)
print(a[0])
print(a[1])
print(a[2])

Mutable Data Type

• Mutable Object Can Change its state
• Types
  • List
  • Dictionary
  • byte array

List

a=[10,"Hello",4.4]
print(a[0])
print(a[1])
print(a[2])

10
Hello
4.4

Type Casting

• Type casting is method to check for type of input
• so in below code id you assign a="vivek" then it will throw run time error
• we can use int(),str(),float(),bool() for this

  # string
  a="100"
  print(type(a))
  
  # typecast string as integer
  b=int(a)
  print(type(b))