Python Program to print Prime Numbers from 1 to 100

Write a Python Program to print Prime numbers from 1 to 100, or 1 to n, or minimum to maximum with example and also calculate the sum of them.

Python Program to print Prime Numbers from 1 to 100 using For Loop

This python program display the prime numbers from 1 to 100. First, we used For Loop to iterate a loop between 1 and 100 values. Within the for loop, we used another For Loop to check whether the number is divisible or not. If true, count incremented, and break statement skip that number.

Next, the if statement checks whether the count is zero, and the given number is not equal to 1. If it is true, it prints the number because it is a Prime Number.

for Number in range (1, 101):
    count = 0
    for i in range(2, (Number//2 + 1)):
        if(Number % i == 0):
            count = count + 1
            break

    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')

 2   3   5   7   11   13   17   19   23   29   31   37   41   43   47   53   59   61   67   71   73   79   83   89   97  

I suggest you refer to the For, While, Prime Number, if statement, and break statement article to understand the Python logic.

Instead of madly printing them from 1 to 100, this python program allows users to enter the minimum and maximum values. Next, it prints prime numbers between Minimum and Maximum values.

minimum = int(input(" Please Enter the Minimum Value: "))
maximum = int(input(" Please Enter the Maximum Value: "))

for Number in range (minimum, maximum + 1):
    count = 0
    for i in range(2, (Number//2 + 1)):
        if(Number % i == 0):
            count = count + 1
            break

    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')

Print Prime Numbers from 1 to 100 using While Loop

In this example, we just replaced the For loop in the above Python Prime Numbers example with While loop.

Number = 1

while(Number <= 100):
    count = 0
    i = 2
    
    while(i <= Number//2):
        if(Number % i == 0):
            count = count + 1
            break
        i = i + 1

    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')
    Number = Number  + 1

 2   3   5   7   11   13   17   19   23   29   31   37   41   43   47   53   59   61   67   71   73   79   83   89   97  

This program to display prime numbers from 1 to N is the same as above. We replaced the For loop with While Loop.

minimum = int(input(" Please Enter the Minimum Value: "))
maximum = int(input(" Please Enter the Maximum Value: "))

Number = minimum

while(Number <= maximum):
    count = 0
    i = 2
    
    while(i <= Number//2):
        if(Number % i == 0):
            count = count + 1
            break
        i = i + 1

    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')
    Number = Number  + 1

 Please Enter the Minimum Value: 100
 Please Enter the Maximum Value: 250
 101   103   107   109   113   127   131   137   139   149   151   157   163   167   173   179   181   191   193   197   199   211   223   227   229   233   239   241  

Python Program to return Sum of Prime Numbers from 1 to 100

This program finds the prime numbers between 1 and 100, and it’s going to add those values to find the sum.

minimum = int(input(" Please Enter the Minimum Value: "))
maximum = int(input(" Please Enter the Maximum Value: "))
total = 0

for Number in range (minimum, maximum + 1):
    count = 0
    for i in range(2, (Number//2 + 1)):
        if(Number % i == 0):
            count = count + 1
            break

    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')
        total = total + Number

print("\n\nSum from %d to %d = %d" %(minimum, maximum, total))

 Please Enter the Minimum Value: 10
 Please Enter the Maximum Value: 150
 11   13   17   19   23   29   31   37   41   43   47   53   59   61   67   71   73   79   83   89   97   101   103   107   109   113   127   131   137   139   149  

Sum from 10 to 150 = 2259

This Python Program allows the user to enter Minimum and Maximum values and find the Sum. Next, Python returns the sum of prime numbers between Minimum and Maximum values

minimum = int(input(" Please Enter the Minimum Value: "))
maximum = int(input(" Please Enter the Maximum Value: "))
total = 0

Number = minimum

while(Number <= maximum):
    count = 0
    i = 2
    
    while(i <= Number//2):
        if(Number % i == 0):
            count = count + 1
            break
        i = i + 1

    if (count == 0 and Number != 1):
        print(" %d" %Number, end = '  ')
        total = total + Number
    Number = Number  + 1
        
print("\n\nSum = %d" %total)

 Please Enter the Minimum Value: 1
 Please Enter the Maximum Value: 100
 2   3   5   7   11   13   17   19   23   29   31   37   41   43   47   53   59   61   67   71   73   79   83   89   97  

Sum = 1060