We all know the importance of JQuery (though Angular rocks). I can say that JQuery is the step one should learn to have his things done.
Trust me, its simple like air / i can assure that you will love the way i explain you(might be little childish).
The simple step i would say is like this
1. Include the Library
2. Define the Input
3. Detect the Input Action – Trigger
4. Do some operation for Input
5. Define the Output
6. Show your Output
Fiddle Created for This Demo
1. Console Output –
2. HTML Output –