How to convert regular time to military time?

So military time is actually pretty easy like I can say it's one in the morning and you would say it's 0100 O one hundred an like 6 in the afternoon is. Sixteen hundred so on morning there's and o in front after noon it's the hour it's like plus ten

If it is am, it is really easy. For example, 0300 is 3:00 am. 1100 is 11 am

In the Pm, just take the military time (24 hour time) and subtract 12. For example:

2100 (9 PM) - 1200 = 900