what is post office protocol
In computing, the Post Office Protocol is an application-layer Internet standard protocol used by e-mail clients to retrieve e-mail from a mail server. POP version 3 is the version in common use.
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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