1. copy=num;sum=0
while(copy!=0)
{
remainder=copy%10;
sum=sum+remainder*remainder*remainder;
copy=copy/10;
}
if (sum==num)-->armstrong else not armstrong
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-----------
rev a num
copy=num;rev num=0;
for(copy2=num; copy2>0;copy2/10)
{
remainder= copy2%10;
rev num=remainder+rev num*10;
}
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-----------
int num,fact=1;
for(int count=num;count>0;count--)
{
fact= count*fact;
}
=-------------------------------------------------------------------------------
-----------
int num,check;
for(int i=2;i<num;i++)
{
check=num%i;
if(check==0)
System.out.println("not prime");
}
System.out.println("prime");
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-----------
int num,
for(int i=0;