Until recently the choice was between the informal Hello and the more formal Good morning (/afternoon/ evening).
Now the formal versions are heard less often, Hello is common and the even more informal Hi is also common.
Hi, Hiya, Hey, ello.
this is how, hi!
Young people will just say Hi and older people Hello
to say hi
hola is how to say hi in cuba
Say Hi was created in 2002.
this is how you say hi in Spanish hola
You can say "hi" but you can not jump "hi".
Hi
hi
to say hi to someone
Hi