ok. so im making an OS and im making a multi user account system, sadly this comes up with an error. if someone can find the error and tell me whats wrong that would be dandy. Thanks
LINK
https://pastebin.com/HH67n4YQ
p.s this is only a portion of the code
2
10 replies to this topic
#1
Posted 12 July 2017 - 02:59 PM
#3
Posted 12 July 2017 - 03:48 PM
It has a problem adding strings as when i make it print the variable after 2 have been added it is wrong and only shows the 1st string
#4
Posted 12 July 2017 - 03:54 PM
"Adding strings" is called concatenation. The operator for this in Lua is two periods. Example:
print( "Hello " .. "World!" )
#5
Posted 12 July 2017 - 04:17 PM
I have a problem with adding variables as well as it does the same
#6
Posted 12 July 2017 - 04:43 PM
That sentance makes me want to stop helping you.
#7
Posted 12 July 2017 - 05:51 PM
sorry, its the same solution isnt it?
#8
Posted 12 July 2017 - 06:15 PM
joshgreat, on 12 July 2017 - 05:51 PM, said:
sorry, its the same solution isnt it?
Sort of... Adding two variables is dependent on the variable type. So a string variable would work as a string just without quotes.
ex = "Hello" ex1 = "world" print(ex .. " " .. ex1) Outputs: Hello world
However, if the variable is a number use it as you would a number
print(5 + 5) Outputs: 10 num = 5 num1 = 6 print(num + num1) Outputs: 11
Mixing the two will not work. It will throw an error. If you want to a print a number in a string, easy.
n = 1 print("Hello, you are " .. tostring(n) .. " person.") Outputs: Hello, you are 1 person. Or you could just change the original variable to a string: tostring(n) If you want to do the opposite, say in a math equation, you'll need to use tonumber(). n = "5" tonumber(n) if n == 5 then print(5) end
This code is unoptimized because it was done quickly, however it's still a decent example.
#9
Posted 12 July 2017 - 06:58 PM
One thing you missed, diamondpumpkin, is that you need to capture the output of tonumber() and tostring() to a variable. They don't change a variable/value, they output a new value.
local n = 1 local nString = tostring(n)
#10
Posted 12 July 2017 - 07:33 PM
Thanks guys il edit my code :-D
#11
Posted 13 July 2017 - 12:09 AM
diamondpumpkin, on 12 July 2017 - 06:15 PM, said:
Mixing the two will not work. It will throw an error.
Actually, Lua will quite happily concatenate strings with numbers, or add string representations of numbers together:
print("2" + "2") --> 4 print("2" + 2) --> 4 print(2 .. 2) --> 22 print("2" .. 2) --> 22
That said, you can't pass a string into something like a "for" loop or a numeric comparison without doing something to convert its type first.
1 user(s) are reading this topic
0 members, 1 guests, 0 anonymous users