Returns the numerical code of a character in a string.
indexByte = string.byte(s [, index[, endIndex]]) indexByte = strbyte(s [, index[, endIndex]])
Arguments[]
- s [, index[, endIndex]]
- s
- string - The string to get the numerical code from
- index
- number - Optional argument specifying the index of the character to get the byte value of
- endIndex
- number - Optional argument specifying the index of the last character to return the value of
Returns[]
- indexByte
- number - The byte value of the character at the specified position or nil if the index is invalid
Example[]
> = string.byte("ABCDE") -- no index, so the first character
65
> = string.byte("ABCDE",1) -- indexes start at 1
65
> = string.byte("ABCDE",0) -- we're not using C
> = string.byte("ABCDE",100) -- index out of range, no value returned
> = string.byte("ABCDE", 1, 3)
65 66 67
Details[]
- The first valid index is 1.
- The last valid index is the length of the string.