octave: Integer Conversions
14.2.8 Integer Conversions
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This section describes the options for the ‘%d’, ‘%i’, ‘%o’, ‘%u’, ‘%x’,
and ‘%X’ conversion specifications. These conversions print integers in
various formats.
The ‘%d’ and ‘%i’ conversion specifications both print an numeric
argument as a signed decimal number; while ‘%o’, ‘%u’, and ‘%x’ print
the argument as an unsigned octal, decimal, or hexadecimal number
(respectively). The ‘%X’ conversion specification is just like ‘%x’
except that it uses the characters ‘ABCDEF’ as digits instead of
‘abcdef’.
The following flags are meaningful:
‘-’
Left-justify the result in the field (instead of the normal
right-justification).
‘+’
For the signed ‘%d’ and ‘%i’ conversions, print a plus sign if the
value is positive.
‘ ’
For the signed ‘%d’ and ‘%i’ conversions, if the result doesn’t
start with a plus or minus sign, prefix it with a space character
instead. Since the ‘+’ flag ensures that the result includes a
sign, this flag is ignored if you supply both of them.
‘#’
For the ‘%o’ conversion, this forces the leading digit to be ‘0’,
as if by increasing the precision. For ‘%x’ or ‘%X’, this prefixes
a leading ‘0x’ or ‘0X’ (respectively) to the result. This doesn’t
do anything useful for the ‘%d’, ‘%i’, or ‘%u’ conversions.
‘0’
Pad the field with zeros instead of spaces. The zeros are placed
after any indication of sign or base. This flag is ignored if the
‘-’ flag is also specified, or if a precision is specified.
If a precision is supplied, it specifies the minimum number of digits
to appear; leading zeros are produced if necessary. If you don’t
specify a precision, the number is printed with as many digits as it
needs. If you convert a value of zero with an explicit precision of
zero, then no characters at all are produced.
Info Catalog
octave: Table of Output Conversions
octave: C-Style I/O Functions
octave: Floating-Point Conversions