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These functions perform conversions between objects of various types and
strings.  The following functions are defined:

atof
    string to "double"

atoi
    string to "int"

atol
    string to "long int"

ecvt
    "double" to E-format string

fcvt
    "double" to F-format string

gcvt
    "double" to string

itoa
    "int" to string

ltoa
    "long int" to string

strtod
    string to "double"

strtol
    string to "long int"

strtoul
    string to "unsigned long int"

ultoa
    "unsigned long int" to string

utoa
    "unsigned int" to string

These functions perform conversions between objects of various types and
wide character strings.  The following functions are defined:

_itow (see itoa)
    "int" to wide character string

_ltow (see ltoa)
    "long int" to wide character string

_ultow (see ultoa)
    "unsigned long int" to wide character string

_utow (see utoa)
    "unsigned int" to wide character string

wcstod (see strtod)
    wide character string to "double"

wcstol (see strtol)
    wide character string to "long int"

wcstoul (see strtoul)
    wide character string to "unsigned long int"

_wtof (see atof)
    wide character string to "double"

_wtoi (see atoi)
    wide character string to "int"

_wtol (see atol)
    wide character string to "long int"

See also  tolower,  towlower,  _mbctolower,  toupper,  towupper,
 _mbctoupper,  strlwr,  _wcslwr,  _mbslwr,  strupr,  _wcsupr and  _mbsupr
which convert the cases of characters and strings.