NAME
    strlen - number of characters in a string

SYNOPSIS
    strlen(x)

TYPES
    x		string

    return	integer

DESCRIPTION
    strlen(x) returns the number of characters in x

EXAMPLE
    > print strlen(""), strlen("abc"), strlen("a b\tc\\d")
    0 3 7

LIMITS
    none

LIBRARY
    none

SEE ALSO
    XXX - fill in