Methods in this pseudo-class can be executed on arbitrary precision number values. More...

Inheritance diagram for Qore::<number>:

Public Member Methods
number	abs ()
	Returns the absolute value of the number. More...

string	format (string fmt)
	Returns a formatted string of the number according to the format argument. More...

string	format (int prec=2, string decimal_sep=".", string thousands_sep="")
	Returns a formatted string of the number according to format arguments. More...

bool	infp ()
	Returns True if the number is infinity (+ or -) More...

bool	intp ()
	Returns True because number values can be converted to integers. More...

bool	nanp ()
	Returns True if the number is NaN (not a number) More...

int	prec ()
	Returns the precision of the current number. More...

int	sign ()
	Returns -1 if the number is negative, 0 if it is zero, or 1 if it is positive. More...

bool	strp ()
	Returns True because number values can be converted to strings. More...

string	toBase (int base=10)
	Converts the number to a different base (and returns it as a string). More...

string	toString (int fmt)
	Returns the string representation of the number according to the format argument. More...

int	typeCode ()
	Returns Qore::NT_NUMBER. More...

bool	val ()
	Returns True if the number is non-zero, False if zero. More...

Public Member Methods inherited from <value>
bool	callp ()
	Returns False; this method is reimplemented in other types and will return True if the given expression is a callable value (ie closures or call references) More...

bool	complexType ()
	returns True if the value has a complex type, False if not More...

bool	empty ()
	Returns True; this method will be reimplemented in container types where it may return False. More...

string	fullType (*bool with_namespaces)
	returns the full type name which differs from the simple type name in case of complex types and objects More...

bool	intp ()
	Returns False; this method is reimplemented in other types and will return True if the given expression can be converted to an integer. More...

AbstractIterator	iterator ()
	Returns an iterator object for the value; the default iterator object returned is SingleValueIterator. More...

int	lsize ()
	Returns 1; the return value of this method should give the list size of the value, which is normally 1 for non-lists (except for NOTHING where the size will be 0) and the number of the elements in the list for lists; this method will be reimplemented in other types where it may return other values. More...

int	size ()
	Returns zero; this method will be reimplemented in container types where it may return a non-zero value. More...

bool	sizep ()
	Returns True if the type can return a non-zero size (True for containers including binary objects and strings, False for everything else) More...

bool	strp ()
	Returns False; this method is reimplemented in other types and will return True if the given expression can be converted to a string. More...

bool	toBool ()
	Returns the boolean representation of the value; the default is False. More...

float	toFloat ()
	Returns the floating-point representation of the value; the default is 0.0. More...

int	toInt ()
	Returns the integer representation of the value; the default is 0. More...

number	toNumber ()
	Returns the arbitrary-precision numeric representation of the value; the default is 0. More...

string	toString ()
	Returns the string representation of the value; the default is an empty string. More...

string	type ()
	Returns the string type for the value. More...

int	typeCode ()
	Returns the type code for the value. More...

bool	val ()
	Returns False; this method is reimplemented in other types and will return True if the given expression has a non-empty value. More...

Detailed Description

Methods in this pseudo-class can be executed on arbitrary precision number values.

Member Function Documentation

◆ abs()

number <number>::abs ( )

Returns the absolute value of the number.

Code Flags:: CONSTANT

Example:: n = n.abs();

Returns: the absolute value of the number

Note: equivalent to abs(number)

Since: Qore 0.8.8

◆ format() [1/2]

string <number>::format	(	int	prec = `2`,
		string	decimal_sep = `"."`,
		string	thousands_sep = `""`
	)

Returns a formatted string of the number according to format arguments.

Code Flags:: RET_VALUE_ONLY

Parameters

prec	the number of digits after the decimal point; a negative value means to round that number of digits before the decimal place, whereas the special constant SNF_AllDigits means to include all possible digits after the decimal point
decimal_sep	a single character that defines the decimal separator; an empty string means no decimal separator
thousands_sep	a single character that defines the thousands and further separators every three digits before the decimal point; an empty string means no thousands separator

Returns: a string representing the number according to the format arguments as described above

Example:: float f = -48392093894.2349;

string fstr = f.format(3, ".", ","); # returns "-48.392.093.894,235"

See also

Since: Qore 0.8.13

◆ format() [2/2]

string <number>::format ( string fmt )

Returns a formatted string of the number according to the format argument.

Code Flags:: RET_VALUE_ONLY

Parameters

fmt

the format string has the following format:
<thousands_separator>[<decimal_separator>[<decimals>]]
where:

thousands_separator and decimal_separator are single characters defining the thousands and decimal separator characters respectively, and
decimals is one or more digits defining how may decimals should appear after the decimal point; a negative number means to round that number of digits before the decimal place

Returns: a string of a formatted number according to a format string; if the format string does not follow the given format, then the number without formatting is returned

Example:: float f = -48392093894.2349;

string fstr = f.format(".,3"); # returns "-48.392.093.894,235"

See also

Since: Qore 0.8.6

◆ infp()

bool <number>::infp ( )

Returns True if the number is infinity (+ or -)

Returns: True if the number is infinity (+ or -)

Code Flags:: CONSTANT

Example:: if (n.infp())

print("the operation resulted in infinity\n");

Qore::print
nothing print(...)
Outputs a string to standard output with no formatting.

Since: Qore 0.8.6

◆ intp()

bool <number>::intp ( )

Returns True because number values can be converted to integers.

Returns: True because number values can be converted to integers

Code Flags:: CONSTANT

Example:: if (n.intp())

printf("%y: can be converted to an integer: %d\n", n, int(n));

Qore::printf
string printf(string fmt,...)
Outputs the string passed to standard output, using the first argument as a format string; does not e...

Qore::int
int int(string str, int base=10)
Converts the string to an integer value with respect to the base.

Since: Qore 0.8.6

◆ nanp()

bool <number>::nanp ( )

Returns True if the number is NaN (not a number)

Returns: True if the number is NaN (not a number)

Code Flags:: CONSTANT

Example:: if (n.nanp())

print("the operation resulted in NaN\n");

Since: Qore 0.8.6

◆ prec()

int <number>::prec ( )

Returns the precision of the current number.

Returns: the precision of the current number

Code Flags:: CONSTANT

Example:: printf("precision: %d\n", n.prec());

Since: Qore 0.8.6

◆ sign()

int <number>::sign ( )

Returns -1 if the number is negative, 0 if it is zero, or 1 if it is positive.

Returns: -1 if the number is negative, 0 if it is zero, or 1 if it is positive

Code Flags:: CONSTANT

Example:: printf("sign: %d\n", n.sign());

Since: Qore 0.8.6

◆ strp()

bool <number>::strp ( )

Returns True because number values can be converted to strings.

Returns: True because number values can be converted to strings

Code Flags:: CONSTANT

Example:: if (n.strp())

printf("%y: can be converted to a string: '%s'\n", n, string(n));

Qore::string
string string(softstring str, *string enc)
Converts the argument to a string.

Since: Qore 0.8.6

◆ toBase()

string <number>::toBase ( int base = 10 )

Converts the number to a different base (and returns it as a string).

Code Flags:: RET_VALUE_ONLY

Parameters

base	the base to convert the number to; this value must be 2 - 36 inclusive or an `INVALID-BASE` exception will be thrown

Returns: the converted value as a string

Example:: (-276536798792387623n).toBase(29)); // returns "-MJ934KRG1O3R"

276536798792387623n.toBase(2)); // returns "1111010110011101001100000011011011010110000000110000100111"

(15.5n).toBase(20)); // returns "F.A"

(-13.8n).toBase(20)); // returns "-D.G"

(21.48n).toBase(15)); // returns "16.73"

Exceptions

INVALID-BASE the base is invalid; must be 2 - 36 inclusive

See also: <int>::toBase(int base); <float>::toBase(int base)

Since: Qore 0.8.13

◆ toString()

string <number>::toString ( int fmt )

Returns the string representation of the number according to the format argument.

Code Flags:: CONSTANT

Parameters

fmt	see Number Formatting Constants for possible values; note that this argument is interpreted as a bit field; if the format argument is not a valid format value (i.e. if none of the formatting bits are set in the argument) then NF_Default is assumed instead

Returns: the string representation of the number according to the format argument

Since: Qore 0.8.6

◆ typeCode()

int <number>::typeCode ( )

Returns Qore::NT_NUMBER.

Returns: Qore::NT_NUMBER

Code Flags:: CONSTANT

Example:: switch (f.typeCode()) {

case NT_NUMBER:

printf("%y: is a number\n", f);

break;

}

Since: Qore 0.8.6

◆ val()

bool <number>::val ( )

Returns True if the number is non-zero, False if zero.

Returns: True if the number is non-zero, False if zero

Code Flags:: CONSTANT

Example:: bool b = f.val();

See also

Since: Qore 0.8.6

Public Member Methods

Detailed Description

Member Function Documentation

◆ abs()

◆ format() [1/2]

◆ format() [2/2]

◆ infp()

◆ intp()

◆ nanp()

◆ prec()

◆ sign()

◆ strp()

◆ toBase()

◆ toString()

◆ typeCode()

◆ val()