How do i add 2 lines of text together

how do i add 2 lines of text together
for example "Coins: " + coinamount

"Coins: "..coinamount
-- This is called concatenation
"Coins: " .. coinamount

Ensure coinamount is a string before hand, if not, convert it since Idont think you can concatenate a string and a number, although I could be wrong

"Coins: " .. tostring(coinamount)

Even if you can, always good practice to ensure what is given to concatenate is a string

Pretty sure you can concatenate a string and number, might still be better practice to make it into a string though