calculate HCF
class hcf
{
public static void main(String args[])
{
int a=10,b=12,HCF=0;
for(int i=1; i<=Math.min(a,b) ; i++)
{
if(a%i==0 && b%i==0)
HCF=i
}
System.out.println(HCF);
}}
How to print 9,99,8,89,7,79....
/ common way to write int a=9,n=10 ; // n value you can take anything for(int i=1;i<=n;i++) { if(i%2==1) { System.out.print(a); } else { System.out..print(a*10+9); a--; }}
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