tonumber()
#!/usr/bin/env lua print(tonumber(1)) print(tonumber("1")) print(tonumber("1.2")) print(tonumber("0x10")) print(tonumber("-0x10")) print(tonumber("010")) print(tonumber("0b10")) print(tonumber("x10")) print(tonumber(true)) print(tonumber("10")) print(tonumber("10", 16)) print(tonumber("Z", 36))
で、
1 1 1.2 16 -16 10 nil nil nil 10 16 35