Python - Find the number of prime numbers within a given range of numbers

When it is required to find the prime numbers within a given range of numbers, the range is entered and it is iterated over. The ‘%’ modulus operator is used to find the prime numbers.

Example

Below is a demonstration of the same

lower_range = 670
upper_range = 699
print("The lower and upper range are :")
print(lower_range, upper_range)
print("The prime numbers between", lower_range, "and", upper_range, "are:")
for num in range(lower_range, upper_range + 1):
   if num > 1:
      for i in range(2, num):
         if (num % i) == 0:
            break
      else:
         print(num)

Output

The lower and upper range are :
670 699
The prime numbers between 670 and 699 are:
673
677
683
691

Explanation

• The upper range and lower range values are entered and displayed on the console.

• The numbers are iterated over.

• It is checked to see if they are greater than 1 since 1 is neither a prime number nor a composite number.

• The numbers are iterated, and ‘%’ with 2.

• This way the prime number is found, and displayed on console.

• Else it breaks out of the loop.

AmitDiwan

Published on 20-Sep-2021 11:01:52

• Related Questions & Answers
• Prime numbers within a range in JavaScript
• PHP program to find the sum of odd numbers within a given range
• How to find Kaprekar numbers within a given range using Python?
• Sum of prime numbers between a range - JavaScript
• Write a Golang program to find prime numbers in a given range
• Find a range of composite numbers of given length in C++
• Finding the count of numbers divisible by a number within a range using JavaScript
• Prime numbers in a range - JavaScript
• Golang Program to Print Odd Numbers Within a Given Range
• Print prime numbers in a given range using C++ STL
• Counting prime numbers that reduce to 1 within a range using JavaScript
• Python Generate random numbers within a given range and store in a list
• C++ Program to Generate Prime Numbers Between a Given Range Using the Sieve of Sundaram
• Finding sum of all numbers within a range in JavaScript
• Summing cubes of natural numbers within a range in JavaScript