Python program to find the square of a number :
We have different ways to find the square of a number in python. In this post, I will show you different ways to do that with examples.
Example 1 : Using arithmetic operator :
Arithmetic operator * is used to multiply two numbers. The below program will take one number as input from the user, calculates the square and prints it out :
num = int(input("Enter a number : "))
num_square = num * num
print("Square of {} is {}".format(num, num_square))
Here, it asks the user to enter a number, reads it and stores it in variable num. Then, it calculates the square value for that number and store it in num_square.
Sample output :
Enter a number : 3
Square of 3 is 9
Enter a number : 4
Square of 4 is 16
Example 2 : Using exponent operator :
Exponent operator ** can be used to find the square of a number. 4**3 means 4 being raised to the 3rd power. Similarly, 4**2 is the square of 4. So, we can read the user input number and raise it to second power using this operator.
num = int(input("Enter a number : "))
num_square = num ** 2
print("Square of {} is {}".format(num, num_square))
Sample output :
Enter a number : 4
Square of 4 is 16
Enter a number : 5
Square of 5 is 25
Enter a number : 11
Square of 11 is 121
Example 3: Using math.pow() :
Python math library provides one method called pow() to calculate the power of a number. It takes two parameters. pow(x,y) means x to the power y. If we use y as 2, it will give us the square of a number.
import math
num = int(input("Enter a number : "))
num_square = math.pow(num, 2)
print("Square of {} is {}".format(num, num_square))
Sample output :
Enter a number : 12
Square of 12 is 144.0
Enter a number : 4
Square of 4 is 16.0
Enter a number : 3
Square of 3 is 9.0
