I want to make an infinite lava source,like with the water. If one puts 2 blocks of water,they will fill another block completely. Lava does not do exactly the same. If this is not possible,lava is limited,not like water. Is there a way to do this?
If this is not possible,lava is limited, not like water.
This is correct. You cannot generate lava in vanilla minecraft without using commands, or creative mode.
However, although lava is limited, it is found in massive quantities in the Nether. So it is theoretically possible to transfer all the lava you want to your world, albeit long and boring.
You can't lava is not an infinite resource (barring going through infinite chunks).