# write a program to print prime numbers between 10 and 99.

write a program to print prime numbers between 10 and 99. First program will print the prime numbers between 1 and 100 2) Second program takes the value of n. If found prime, print the number. Then the next number in the loop is checked, till all numbers are checked.

## write a program to print prime numbers between 10 and 99.

Contents

### Program to display the prime numbers from 1 to 100

It will display the prime numbers between 1 and 100.

```class UniqNoDemo
{
public static void main (String[] args)
{
int i =0;
int num =0;
//Empty String
String  UniqNoDemo = "";

for (i = 1; i <= 100; i++)
{
int myFlag=0;
for(num =i; num>=1; num--)
{
if(i%num==0)
{
myFlag = myFlag + 1;
}
}
if (myFlag ==2)
{
//Appended the Prime number to the String
UniqNoDemo = UniqNoDemo + i + " ";
}
}
System.out.println("Prime numbers from 1 to 100 are :");
System.out.println(UniqNoDemo);
}
}
```

Output:
```Prime numbers from 1 to 100 are :
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
```

### Program to display prime numbers from 1 to n

```import java.util.Scanner;
class UniqNoDemo2
{
public static void main (String[] args)
{
Scanner scanner = new Scanner(System.in);
int i =0;
int num =0;
//Empty String
String  UniqNoDemo = "";
System.out.println("Enter the value of n:");
int n = scanner.nextInt();
scanner.close();
for (i = 1; i <= n; i++)
{
int myFlag=0;
for(num =i; num>=1; num--)
{
if(i%num==0)
{
myFlag = myFlag + 1;
}
}
if (myFlag ==2)
{
//Appended the Prime number to the String
UniqNoDemo = UniqNoDemo + i + " ";
}
}
System.out.println("Prime numbers from 1 to n are :");
System.out.println(UniqNoDemo);
}
}
```

### Program to find Prime Numbers Between given Interval

Using Static Method
Find Prime Numbers Java Program 1 To N

```class UniqNoDemo
{
public static void main(String arg[])
{

System.out.println("Enter a number ");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
UniqNoDemoCal(n);
}
static void UniqNoDemoCal(int num)
{
int flag=0;
for(int i=1;i<=num;i++)
{
if(num%i==0)
{
flag++;
}
}
if(flag==2)
System.out.println("UniqNoDemo number ");
else
System.out.println("Not a UniqNoDemo number ");
}
}
```

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Find Prime Numbers Between 1 to n
Java Program To Find Prime Numbers Between 1 to n Numbers

```class UniqNoDemo
{
public static void main(String arg[])
{
int i,flag;
System.out.print("Enter n value : ");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
System.out.println("Prime numbers between 1 to "+n+" are ");
for(int j=2;j<=n;j++)
{
flag=0;
for(i=1;i<=j;i++)
{
if(j%i==0)
{
flag++;
}
}
if(flag==2)
System.out.print(j+"  ");
}
}
}
```

Prime Number Java Program â€“ Using While Loop

```class FindUniqNoDemo
{
FindUniqNoDemo(int num)
{
int flag=0,i=1;
while(i<=num)
{
if(num%i==0)
{
flag++;
}
i++;
}
if(flag==2)
System.out.println(num+" is a prime number ");
else
System.out.println(num+" is a Not a prime number ");
}
}
class UniqNoDemo
{
public static void main(String arg[])
{
System.out.println("Enter a number ");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
new FindUniqNoDemo(n);
}
}

```

Using For Loop

```class UniqNoDemo
{
public static void main(String arg[])
{
int flag=0;
System.out.println("Enter a number ");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
for(int i=1;i<=n;i++)
{
if(n%i==0)
{
flag++;

}
}
if(flag==2)
System.out.println("prime number ");
else
System.out.println("Not a prime number ");
}
}
```

Using Recursion

```class UniqNoDemo
{
static int flag=0,i=1;
int UniqNoDemoOrNot(int num)
{
if(i<=num)
{
if(num%i==0)
{
flag++;
}
i++;
UniqNoDemoOrNot(num);
}
return flag;
}
public static void main(String arg[])
{
System.out.println("Enter a number ");
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
UniqNoDemo p=new UniqNoDemo();
int c=p.UniqNoDemoOrNot(n);
if(c==2)
System.out.println("prime number ");
else
System.out.println("Not a prime number ");
}
}
```

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