Input and Output Operation in Python,How to take input from user's in Python,How to display output in Python

Python provides input() and print() to take input and display output into the program.

Python provides a predefined function to take input from the keyboard and display output into the monitor.

1)  input():-  

It is used to take input from the keyboard using a String pattern (a combination of char), we can pass the display message as a parameter into input(). that is used to reduce the extra code as compared to C and CPP programming language.

var = input("message")     #var is the variable name which will assign input data into string pattern

we can convert input data into other datatype such as int, float using the type conversion method.

to convert into an integer then it provides int(), to convert into float it provides float().

input() takes one parameter to display the message in a String format and it also returns data into String form.

var = input("message")

Example of input() to take input for integer data

a = int(input("Enter number"))

Example of input() to take input for float data

b = float(input("Enter float value"))

Example of input() to take input for String data

c = input("Eter string value"))

int():-   It is used to convert numeric String type data or float type data to an integer.

Syntax:-

var  = int(input("message"))   #it will take integer type input

int() is used to convert numeric string type data to the integer type.

Float():- float() is used to convert numeric string type data to float type.

Syntax:-

var = float(input("message"))  #it will take input for float type

Str():-  It is used to convert integer type data to String type, but no need to use it under input() because of the Input method linked with str() by default.

2)  print():-    

It is used to display output data using a single statement and multiple statements.

this method can accept the single parameter and multiple parameters both.

for multiple parameters, we will use a comma separator.

print("hello")

print("hello",12,"hi","welcome")

...................................................................

print() using format specifier

a=12.345

b=23.56

print("a=%d and b=%d " % 100,200)   %d int, %f float, %s string

print() using comma separator 

print(statement1, statement2)

print() using format() to print multiple statements under Single Statement.

print("a={0} and b={1}".format(a,b))  # it uses placeholder

print() to write an expression

print() using String concatenation.

note:-  all variables or literals or constant must be String for String Concatenation.

print("a="+str(a)) 

print("a="+str(a) + "b="+str(b))

print("statement1")     #Single Statement

print("statement1","statement2")  #Multiple Statements

print("statement1"+"statement2")  #Concatenation with two Strings

print("statement1" + str(10))  #str() is used to convert int ,float to String 

print("result is ",12.3444567891)  #print float value

print("result is %.2f" %  12.3444567891) #print formatted float value

print("{0},{1}".format(2,3))  # {0} and {1} is called placeholder in print()

A basic example of str() in:-

s="hello"

y=10
print(s+str(y))
a=10
b=20.34
print(a+b)

Another example to uses multiple print

a=12.345

b=23.56

print("a=%d and b=%d " % (a,b))

print("a=%f and b=%f" % (a,b))

print("a=%.2f and b=%.2f" % (a,b))

print("a=",a,"b=",b)

print(a,b)

print("a={0} and b={1}".format(a,b))  # it uses placeholder

print(a+b)

print(a+b,a*b,a/b,a%b)

print("a="+str(a) + " b= "+str(b))  #str() to convert int,float to String 

Program assignment:-

1. WAP to calculate the salary of the employee where basic, ta, da, comm, pf, noofleave will be entered by the user?
2. WAP to calculate compound interest?    *
3. WAP to reverse the five-digit number where the first and last digit will be in the same position
4. WAP to swap two numbers without using a third variable
5. WAP to calculate square and cube of any entered number?