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Program to print all prime numbers between 1 to 100

Program to print all prime numbers between 1 to 100 on fibonacci, factorial, prime, armstrong, swap, reverse, search, sort, stack, queue, array, linkedlist, tree, graph, pattern, string etc.

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Program to print all prime numbers between 1 and 100

Prime Numbers:

Prime numbers are the natural numbers that can be divided by their self or by 1 without any remainder.

For example: 2, 3, 5, 7, 11, 13, 17 etc.

NOTE: 2 is the only even prime number.

In this program, we need to print the prime numbers between 1 and 100 only.

Algorithm

  • STEP 1: START
  • STEP 2: SET ct =0, n=0, i=1,j=1
  • STEP 3: REPEAT STEP 4 to STEP 11 until n<25
  • STEP 4: SET j= 1
  • STEP 5: SET ct = 0
  • STEP 6: REPEAT STEP7 to STEP 8 UNTIL j<=i
  • STEP 7: if i%j = = 0 then ct =ct +1
  • STEP 8: j = j + 1
  • STEP 9: if ct= 2 then print i
  • STEP 10: n = n +1
  • STEP 11: i = i +1
  • STEP 12: END

Java Program

public class Prime
{
public static void main(String[] args) 
    {
int ct=0,n=0,i=1,j=1;
while(n<25)
{
j=1;
ct=0;
while(j<=i)
{
if(i%j==0)
ct++;
j++; 
}
if(ct==2)
{
System.out.printf("%d ",i);
n++;
}
i++;
}  
}
}

Output:

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

C progam

#include <stdio.h>
int main()
{
    int ct=0,n=0,i=1,j=1;
	while(n<25)
	{
		j=1;
		ct=0;
		while(j<=i)
		{
			if(i%j==0)
			ct++;
			j++; 
		}
		if(ct==2)
		{
			printf("%d ",i);
			n++;
		}
		i++;
}
}

Output:

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

Python Program

r=100
for a in range(2,r+1):
    k=0
    for i in range(2,a//2+1):
        if(a%i==0):
            k=k+1
    if(k<=0):
        print(a, end = " ");

Output:

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

C# Program

using System; 
public class Prime_Number
{
   public static void Main()
    {
    int ct=0,n=0,i=1,j=1;
	while(n<25)
	{
		j=1;
		ct=0;
		while(j<=i)
		{
			if(i%j==0)
			ct++;
			j++; 
		}
		if(ct==2)
		{
			Console.Write(i);
			Console.Write(" ");
			n++;
		}
		i++;
}
}}

Output:

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

PHP Program

<?php
$ct=0;
$n=0;
$i=1;
$j=1;
while($n<25)
{
$j=1;
$ct=0;
while($j<=$i)
{
if($i%$j==0)
$ct++;
$j++; 
}
if($ct == 2)
{
echo $i;
echo " ";
$n++;
}
$i++;
}
?>

Output:

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
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