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Sample ip

Sample op
1 2 3 4 Bus 6 7 8 9 bUs 11 12 13 14 buS 16

What I have tried:

Scanner sc=new Scanner(;
int n=sc.nextInt();
for(int i=1; i<=n; i++)
System.out.print(i+" ");
Updated 30-Jan-20 4:06am

You need to differentiate bus then, capitalizing a distinct letter at each occurrence. Tip: the following assertions are valid:
when i % 3 == 2, Bus should be printed
when i % 3 == 1, bUs should be printed
when i % 3 == 0, buS should be printed

I think this exercise is here to make you realize what the modulo operator can be used for.
phil.o 31-Jan-20 8:24am
Nothing prevents you from combining both constraints.
phil.o 31-Jan-20 8:27am
You print the number regardless of whether you printed "bus" or not.
You need to put the print of the number in an else clause so it only prints when you haven't printed "bus".

(And you probably want to print "Bus " instead of "bus" anyway!)

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