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Declaring and Initializing a Variable
In Python, variables are declared and initialized at the same time in the following way:
a = 10
b = 20
print ("a=", a)
print ("b=", b)
On the output screen, a = 20 and b = 40 will be printed. You can also assign the same value to multiple
variables at the time in the following way:
a = b = 20
print ("a=", a)
print ("b=", b)
On the output screen, a = 20 and b = 20 will be printed.
You can also assign multiple values to multiple variables in the same line in the following way:
name, age, grade="Deepak", 12, ‘VII’
print ("Name is", name)
print ("Age is", age)
print ("Grade is", grade)
On the output screen, Name is Deepak, Age is 12 and Grade is VII will be printed.
You must follow the given rules while creating and naming the variables:
A variable name must start with a letter or underscore character.
A variable name cannot start with a number.
A variable name can only contain alphanumeric characters (all the letters of the alphabet and
numbers) and underscores (_).
Variable names are case-sensitive.
Variable names cannot contain any special character or symbol.
Double Tap
Circle the incorrect variable in the following code.
Roll no = 201 Student Name = "Chirag" Section = 'A'
DATA TYPES
A data type specifies the type of value a variable can contains. For example, a person’s name must be
stored as a string value whereas the person’s age must be stored as an integer.
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