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What is the sympy.isprime() method in Python?

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What is the sympy library?

sympy is library that is used for symbolic mathematics.

pip can be used to install sympy. Refer to the following command:

pip install sympy

The isprime method

The isprime method is used to determine whether the given number is a prime number or not. This method is intended to be used for integers. Any floating-point numbers (limited precision numbers) will result in False. Negative numbers are not considered prime numbers.

Syntax

sympy.isprime(n)

Parameter value

  • n: This is the number that needs to be tested.

Return value

The isprime method returns True if the given positive integer is a prime number. Otherwise, it returns False.

Code example

import sympy
num = 19
print("sympy.isprime(%s) = %s" % (num, sympy.isprime(num)))
num = 19.00
print("sympy.isprime(%s) = %s" % (num, sympy.isprime(num)))
num = -3
print("sympy.isprime(%s) = %s" % (num, sympy.isprime(num)))
Implementation of the "isprime()" method

Code explanation

  • Line 1: We import the sympy module.
  • Lines 3, 7, and 11: We define different integer values for num.
  • Lines 5, 9, and 14: We check whether num is a prime number or not by using the isprime method.

The output indicates that the isprime method returns False for floating-point numbers and negative numbers.

RELATED TAGS

python
communitycreator
method
isprime
sympy

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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