Like every programming language, Python also have keywords(Reserved Words). you can not use them as a variable name or any other identifier name.

Python Keywords List

Python Keywords are used to perform an internal operation. All the keywords of Python contain lower-case letters only.

Python Variables

A variable is a named memory allocation which may vary at the time of execution.

Exa: x=100

Here x is an int type of variable and the value 100 is assigning to x.

Unlike other programming languages, there is no required to specify any data type explicitly to declare a variable.

Example:

y=12.34
z=”Mama”

print(y)
print(z)

Output:
12.34
Mama

x1 = 100 # x1 is of type int

x1 = "Silan" # x1 is now of type str

print(x)

Here String variables can be declared either by using single or double or triple quotes. For ex;

x2 = "Silan"

# is the same as

x2 = 'Silan'

Variable Names

Examples:

#valid variable names:

mydata = "Silan"

my_data = "Silan"

_my_data = "Silan"

myData = "Silan"

MYDATA = "Silan"

mydata1 = "Silan"

#invalid variable names:

1mydata = "Silan"

my-data = "Silan"

my data = "Silan"

#Variable manipulation
t1=100
t2=12.34
s1="Silan"
s2="Tutorial"

print(t1)
print(t2)
print(s1)
print(s2)

Output:
100
12.34
Silan
Tutorial

t1+t2

Output: 112.34

s1+s2

Output: 'SilanTutorial'

t1+s1

Output: TypeError: unsupported operand type(s) for +: 'int' and 'str'

Recommended Posts: