Fibonacci program
class fib
{
public static void main(String[] arg)
{
int i,a=0,b=0,c=1;
int n=8;
System.out.println("fibonacci series"+n);
for(i=1;i<=n;i++)
{
a=b;
b=c;
c=a+b;
System.out.println(c);
}
}
}
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armstrong numbers
class fivearms
{
public static void main(String args[])
{
int r,temp,count;
for(count=1;count<500;count++)
{
int sum=0;
temp=count;
while(temp!=0)
{
r=temp%10;
temp=temp/10;
sum=sum+(r*r*r);
}
if(sum==count)
System.out.println("no.s are"+count);}
}
}
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prime number
class prime{
public static void main(String []args){
int num=6;
int fac=0;
for(int i=1;i<=6;i++)
{
if(num%i==0)
fac++;
}
if(fac==2)
System.out.println("Is a prime no");
else
System.out.println("Not a prime no");
}
}
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factorial
class factorial{
public static void main(String args[])
{
int f=1,i;
for(i=1;i<=5;i++)
f=f*i;
System.out.println("factorial="+f);
}
}
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swap without using third variable
class swap
{
public static void main(String []args)
{
int a=25;
int b=10;
System.out.println("Initially a="+a+"b="+b);
a=a+b;
b=a-b;
a=a-b;
System.out.println("a="+a+"\nb="+b);
}
}
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