lua_isnumber
[-0, +0, -]
int lua_isnumber (lua_State *L, int index);

Returns 1 if the value at the given acceptable index is a number or a string convertible to a number, and 0 otherwise.

EVERYTHING
Functions and Types
lua_Alloc
lua_atpanic
lua_call
lua_CFunction
lua_checkstack
lua_close
lua_concat
lua_cpcall
lua_createtable
lua_dump
lua_equal
lua_error
lua_gc
lua_getallocf
lua_getfenv
lua_getfield
lua_getglobal
lua_getmetatable
lua_gettable
lua_gettop
lua_insert
lua_Integer
lua_isboolean
lua_iscfunction
lua_isfunction
lua_islightuserdata
lua_isnil
lua_isnone
lua_isnoneornil
lua_isnumber
lua_isstring
lua_istable
lua_isthread
lua_isuserdata
lua_lessthan
lua_load
lua_newstate
lua_newtable
lua_newthread
lua_newuserdata
lua_next
lua_Number
lua_objlen
lua_pcall
lua_pop
lua_pushboolean
lua_pushcclosure
lua_pushcfunction
lua_pushfstring
lua_pushinteger
lua_pushlightuserdata
lua_pushliteral
lua_pushlstring
lua_pushnil
lua_pushnumber
lua_pushstring
lua_pushthread
lua_pushvalue
lua_pushvfstring
lua_rawequal
lua_rawget
lua_rawgeti
lua_rawset
lua_rawseti
lua_Reader
lua_register
lua_remove
lua_replace
lua_resume
lua_setallocf
lua_setfenv
lua_setfield
lua_setglobal
lua_setmetatable
lua_settable
lua_settop
lua_State
lua_status
lua_toboolean
lua_tocfunction
lua_tointeger
lua_tolstring
lua_tonumber
lua_topointer
lua_tostring
lua_tothread
lua_touserdata
lua_type
lua_typename
lua_Writer
lua_xmove
lua_yield

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