Python User Input

input() → used to take input from the user

By default, input values are stored as string

example

a = input("enter the value of a: ")
print(a)
 
username = input("enter your name: ")
print("Welcome!", username)

Question

Write a program in Python to find the sum of two numbers

a = input("enter a number: ")
b = input("enter a number: ")
 
sum = a + b
print("Sum of two numbers:", sum)

output

enter a number: 5
enter a number: 10
Sum of two numbers: 510

Reason:
Both a and b are strings, so + joins them (concatenation)

We need type casting to convert input into numbers

a = int(input("enter a number: "))
b = int(input("enter a number: "))
 
sum = a + b
print("Sum of two numbers:", sum)

output

enter a number: 5
enter a number: 10
Sum of two numbers: 15

Note

Always convert input to the correct data type when working with numbers.

Question

Write a program in Python to find the average of two numbers.

a = float(input("enter 1st number: "))
b = float(input("enter 2nd number: "))
avg = (a+b)/2
print("avg of two numbers: ", avg)

output

enter 1st number: 8
enter 2nd number: 4
avg of two numbers: 6.0

Second Brain