121 121.2323 121.2323e-1 121.2323e13434 2323E34 0x12323 0xfF2323 0xabcdef 0xABCDEF .2323 .2323e-1 .2323e13434 [[ hello world ]] [=[ hello world ]=] [====[ hello world ]====] "another world" 'what world'