Python program to print all prime numbers in a range

Python example大全

In this program, you will learn to use the for loop to print all prime numbers in a range and display them.

To understand this example, you should understand the followingPython programmingTopic:

• Python if ... else statements

• Python for loop

• Python break and continue statements

a number greater than1positive integers, except1has no other factors, and this number itself is called a prime number.

2,3,5,7are prime numbers because they have no other factors. But6Is not a prime number (it is a composite number) because2×3 = 6.

Source code

#Python program to display all prime numbers in a range
lower　=　900
upper　=　1000
print(lower,　"and",　upper,　"are prime numbers:")
for　num　in　range(lower,　upper　+　1):
　　　#All prime numbers are greater than1
　　　if　num　>　1:
　　　　　　　for　i　in　range(2,　num):
　　　　　　　　　　　if　(num　%　i)　==　0:
　　　　　　　　　　　　　　　break
　　　　　　　else:
　　　　　　　　　　　print(num)

Output results

900　and　1000　There are prime numbers between:
907
911
919
929
937
941
947
953
967
971
977
983
991
997

Here, in lower and upper+1Find prime numbers in the range. Visit this page to learn howCheck if a number is a prime.

Python example大全