Displaying Output
To display output in the terminal we use the print() function.
Syntax: print(text to display)
Example:
print("Hello World")
Taking Input
For taking input, we use the input() function.
Syntax: input(text to display for input)
Example:
name = input("Enter your name: ")
print("Hi, " + name)
Comments
Programmers use comments to explain parts of code in their program.
Single-line comment: For only commenting a single line we use #.
Multiple line comment: For commenting multiple lines we use """ at the start and also end it using """.
Usage:-
#Single line comment
"""
Multiple line
comment
"""
Variables
There are 4 types of variables:-
str: It stores a character or a list of characters. (Use " " during initializing a string value)
int: It stores an integer.
float: It stores a decimal number.
bool: It can store only 2 values, True or False (Remember the t and f in true and false are always capital)
initializing a Variable
To assign a value to a variable we simply use '='.
It is not necessary to define the data type of the variable and can even be changed after it is set.
Syntax: <variable name> = <value>
Example:
a = 9 #variable a storing integer value 9.
b = "Hello" #variable b storing a string Hello.
c = True #variable c storing boolean value True.
d = 8.7 #variable d storing float value 8.7 .
Type Casting
Sometimes you might want to change the data type of the variable for specific purposes. This can be done by using type casting.
Syntax: <variable name> = <data type to change into>(<value>)
Example:
#Convert integer to string
a = 6
a = str(6)
print("The number is " + a)
#Output: The number is 6
#Converting float to integer
b = 8.7
b = int(8.7)
print("Value of b is "+b)
#Output: Value of b is 8
Arithmetic Operations (Basic)
You can also perform mathematical operations in python such as addition, subtraction etc!
Operators:-
Addition
Subtraction
Division
Multiplication
Modulus
Floor Division
Exponent
Addition
"+" is the addition operator.
a = 6
b = 7
print(a+b)
#Output: 13
Subtraction
"-" is the subtraction operator.
a = 5
b = 4
print(a-b)
#Output: 1
Division
"/" is the division operator.
a = 15
b = 5
print(a/b)
#Output: 3
Multiplication
"*" is the multiplication operator.
a = 8
b = 7
print(a*b)
#Output: 56
Modulus
"%" is the modulus operator. It is used to store only the remainder in the division.
a = 10
b = 5
print(a%b)
#Output: 0
Floor Division
"//" is the floor division operator. It is used to round of the result of the quotient of the division to the nearest integer.
a = 3
b = 2
print(a//b)
#Output: 1
#Explanation: The division will give the quotient as 1.5, after rounding it off it is going to become 1.
Exponent
"**" is the exponentiation operator. It is used to increase the value of the first variable to the power of the second variable.
a = 1
b = 3
print(a**b)
#Output: 1
"""
Explanation: The value is found by multiplying 1 three times, that is to raise the value of 1 to the power of 3.
1*1*1 = 1
"""
Conclusion
If you have any doubts, feel free to comment it!
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