A script I’m writing needs to check if the name of an items happens to be a number, using typeof().
However, it always returns “string”, because, for example, “5” is a string, while 5 is a number.
How do I check if it’s also a number, so that my script works?
Use tonumber. It returns nil if its argument cannot be casted to a number.
print(tonumber("5") == 5) -- true
print(tonumber("five")) -- nil
if tonumber(x) then where x is a string.
function IsNumber(n)
if tonumber(n) then
return true
else
return false
end
end
print(IsNumber("3")) --> true
print(IsNumber("three")) -- false