Python square root Code Example
Last Updated On
Thursday 20th Jan 2022
- A square root of a number is a value that gives the original number when multiplied by itself.
- For example,
2 x 2 = 4, so a square root of 4 is 2. -2 x -2 = 4.
square root in python
- Create a function that takes one argument as the input from the user.
- Then, if the number is negative, it returns nothing.
- As a square root of a number is simply the number raised to the power.
- This will give us the square root of the number and print out the result to the user
Example 1 : Using Exponent
n = int(input("Input : "))
def sqrt(n):
if n < 0:
return
else:
return n**0.5
print("The square root of", n, "is", sqrt(n))
# Input : 25
# The square root of 25 is 5.0
Example 2 : Using Math.sqrt()
- The
sqrt() method returns the square root of the number x.
Math.sqrt() cannot be accessed directly. You need to import the math module.
import math
import math
print(math.sqrt(100))
print(math.sqrt(36))
print(math.sqrt(math.pi))
# 10.0
# 6.0
# 1.7724538509055159
Example 3
n = int(input("Input : "))
def sqrt(n):
# number entered stored as x, x is a variable carrying entered number
x = n
# y store x + 1 divided by 2 based on
y = (x + 1) / 2
while y < x:
x = y
y = (x + n / x) / 2
return y;
print("Square root of", n,sqrt(n))
# Input : 49
# Square root of 49 is 7.0