Table of Contents
Syntax to Import math Module:
import math Syntax to use math.sqrt()
math.sqrt(x); Here, x is any positive number whose square root we want to find out.
Let’s have a look at few examples.
Example#01: When you Pass Positive Numbers to the math.sqrt()
Code
import math
num1 = 9
num2 = 7
num3 = 3.14
num4 = 6.09
sqrt_num1 = math.sqrt(num1)
sqrt_num2 = math.sqrt(num2)
sqrt_num3 = math.sqrt(num3)
sqrt_num4 = math.sqrt(num4)
print("math.sqrt(9) = " , sqrt_num1)
print("math.sqrt(7) = " , sqrt_num2)
print("math.sqrt(3.14) = " , sqrt_num3)
print("math.sqrt(6.09) = " , sqrt_num4)
Output
In the above example, we passed positive values in math.sqrt() function and found their square root. We can see all the values that function returned are in float data type.
Pro Tip: What if we want the square root of any number in integer form? We can use the round() function for that purpose.
Example#02: When you Pass Negative Numbers to the math.sqrt() Function
Code
import math
num1 = -9
sqrt_num1 = math.sqrt(num1)
print("math.sqrt(-9) = " , sqrt_num1)
Output
In the above example, we saw that if we are passing negative value to the math.sqrt() function, it is throwing an error exception.
Now, what if we have a negative number and want to find out its square root without any exception?
We can use abs() function to serve the purpose. Have a look at the example below.
Example#03: When you Pass Negative Numbers to the math.sqrt() Function and Still Want Result
Code
import math
num1 = -9
abs_num1 = abs(num1)
sqrt_num1 = math.sqrt(abs_num1)
print("math.sqrt(abs(-9)) = " , sqrt_num1)
Output
Here, abs() function will convert that negative number (-9) into a positive number and then math.sqrt() will find its square root.
Conclusion
In this article, we discussed math.sqrt() function used to find the square root of any positive number. This function was returning the value in float form. We discussed how we could get it in integer form, and finally, we saw how we could find out the square root of a negative number without an error.