A hash sign ( # ) that is not inside a string literal is the beginning of a comment .All characters after the # , up to the end of the physical line, are part of the comment and the Python interpreter ignores them.
# This is a comment
The above statements will produce the following result:
You can type a comment on the same line after a statement or expression as shown below: names ” Prashant ” # This is again comment
Python does not have multiple-line commenting feature.You have to comment each line individually as shown below :
# This is a comment .
# This is a comment , too .
# This is also a comment .
#I said that already .
Variables Variable is a memory space reserved in computer memory to store a value and that value can be further changed if needed. Based on the type of value, the interpreter allocates memory space.
Python variables do not need explicit declaration to create a variable.The declaration happens automatically when value is assigned to a variable.The equal sign (=) is used to assign values to variables
The operand to the left of the = operator is the name of the variable and the operand to the right of the = operator is the value stored in the variable.
age = 23 #Creating an integer variable and assigning integer value to it
price = 45.67 #Creating a floating variable and assigning floating value to it
name = ” Manoj “ #Creating a string variable and assigning string value to it
print(age) #printing value of variable age
print(price) #printing value of variable price
print(name) #printing value of variable name
Above statements will assign values 23, 45.67 and “Manoj” to variables age, price, and name, respectively and will produce the following output:
Python allows us to assign same value to multiple variables simultaneously. For example, consider the following statement:
The above statement will assign value 1 to all the three variables.
You can also assign different values to multiple variables simultaneously. For example, consider the following statement:
a, b, c = 1,2, “john”
The above statement will create two integer variables a and b and values 1 and 2 will be assigned to the variables a and b respectively and one string variable c and the value “john” is assigned to variable c