Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
16  10501 
On Mar 24, 12:13 am, "DirtyHarry" <kim20...@gmail.comwrote:
Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
What you call 'double' - real32?
I'm certainly not well versed in the history of the languages ( I
suspect this dates back to C ) nonetheless, Fortran is the only
language I've encountered that used REAL. Granted, rational,
irrational etc - numbers are approximations of real arithmetic, I
suspect machine precision limitations plays an important role. Beyond
that I'm unsure what the impetus is.
DirtyHarry wrote:
Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
float stands for "floating point" as opposed to "fixed point". It is a
more accurate description than "real" since not all real numbers are
representable by a floating point number.
"DirtyHarry" <ki******@gmail.comwrote in message
news:11**********************@e65g2000hsc.googlegr oups.com...
Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
So if we call a float a real, does that mean we have to call an int a fake?
float is more descriptive I believe.
DirtyHarry wrote:
Is there any particular reason to call 'float' instead of 'real'?
Because a 'float' is not a real number, but a floating point number.
There's a big difference.
Dnia Fri, 23 Mar 2007 21:49:04 -0700, ma740988 napisał(a):
Fortran is the only language I've encountered that used REAL.
Pascal used it too ;)
And it's probably the language used formerly by OP, causing
his confusion upon encountering 'float' ;J
--
SasQ
Jim Langston wrote:
"DirtyHarry" <ki******@gmail.comwrote in message
news:11**********************@e65g2000hsc.googlegr oups.com...
>Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
So if we call a float a real, does that mean we have to call an int a
fake?
I guess the OP is talking about the mathematical term as in "real number",
not the opposite of "fake".
float is more descriptive I believe.
Agreed.
DirtyHarry wrote:
Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
Counter question: Is there any particular reason to call it 'real' instead
of 'float'?
DirtyHarry wrote:
Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
float is short for "floating-point." double is short for
double-precision floating point.
--
-- Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com)
Author of "The Standard C++ Library Extensions: a Tutorial and
Reference." ( www.petebecker.com/tr1book)
On Mar 24, 8:43 am, Rolf Magnus <ramag...@t-online.dewrote:
Counter question: Is there any particular reason to call it 'real' instead
of 'float'?
I suspect the OP's thought process reflects what I - perhaps all of us
- was taught in a mathematical sense. In that regard, I'd talk in
terms of integers, real numbers and complex numbers. These are terms
everyone understands including C / C++ programmers. I had a similar
question hen I first encountered 'floats and double'. I'd like to
believe Real32 and Real64 would suffice, but considering C/C++ has
been around for sometime, you chalk it up to 'it is what it is' and
move on.
In the end, the OP could always - worse case - typedef the float/
double to what he/she considers a more meaningful description. That's
the beauty of the language.
Gianni Mariani ha scritto:
It is a
more accurate description than "real" since not all real numbers are
representable by a floating point number.
neither are all the integers by int...
Giff wrote:
Gianni Mariani ha scritto:
It is a
>more accurate description than "real" since not all real numbers are
representable by a floating point number.
neither are all the integers by int...
All integers from INT_MIN to INT_MAX are. For 'float' that is not so.
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask
On Mar 24, 8:58 am, "ma740988" <ma740...@gmail.comwrote:
On Mar 24, 8:43 am, Rolf Magnus <ramag...@t-online.dewrote:
Counter question: Is there any particular reason to call it 'real' instead
of 'float'?
I suspect the OP's thought process reflects what I - perhaps all of us
- was taught in a mathematical sense. In that regard, I'd talk in
terms of integers, real numbers and complex numbers. These are terms
everyone understands including C / C++ programmers. I had a similar
question hen I first encountered 'floats and double'. I'd like to
believe Real32 and Real64 would suffice, but considering C/C++ has
been around for sometime, you chalk it up to 'it is what it is' and
move on.
A "real" type would have to be able to represent irrational numbers -
which floating point numbers cannot represent, since all floating
point numbers (except for infinity) are rational.
In the end, the OP could always - worse case - typedef the float/
double to what he/she considers a more meaningful description. That's
the beauty of the language.
Defining a "real" typedef for float is not going to change the types
of numbers that a float can represent. So the typedef would not change
the fact that a float does not represent real numbers, but the "real"
name could mislead anyone who sees it - into believing that it does.
Greg
* Greg Herlihy:
On Mar 24, 8:58 am, "ma740988" <ma740...@gmail.comwrote:
>On Mar 24, 8:43 am, Rolf Magnus <ramag...@t-online.dewrote:
>>Counter question: Is there any particular reason to call it 'real' instead
of 'float'?
I suspect the OP's thought process reflects what I - perhaps all of us
- was taught in a mathematical sense. In that regard, I'd talk in
terms of integers, real numbers and complex numbers. These are terms
everyone understands including C / C++ programmers. I had a similar
question hen I first encountered 'floats and double'. I'd like to
believe Real32 and Real64 would suffice, but considering C/C++ has
been around for sometime, you chalk it up to 'it is what it is' and
move on.
A "real" type would have to be able to represent irrational numbers -
which floating point numbers cannot represent, since all floating
point numbers (except for infinity) are rational.
>In the end, the OP could always - worse case - typedef the float/
double to what he/she considers a more meaningful description. That's
the beauty of the language.
Defining a "real" typedef for float is not going to change the types
of numbers that a float can represent. So the typedef would not change
the fact that a float does not represent real numbers, but the "real"
name could mislead anyone who sees it - into believing that it does.
Well. 'int' is rather misleading too. Come to think of it, is there
any type name in a programming language that isn't misleading, when one
thinks of it with mathematical-inspired expectations?
--
A: Because it messes up the order in which people normally read text.
Q: Why is it such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?
"DirtyHarry" worte:
Good day everyone. This sounds like a stupid question, but I became
just curious yesterday, and I looked up several textbooks. However, no
textbooks on computer language (that I have ) mentioned this. So I am
asking to you, gurus...
Is there any particular reason to call 'float' instead of 'real'?
My guess is that it originated with the hardware designers. It seemed
descriptive so others that came along just adopted it.
My theory seems to be supported by this link. http://www.oars.utk.edu/math_archive...pr99/0144.html
Thanks, everyone... Finally I got out of clouds...
Dnia Fri, 23 Mar 2007 21:59:12 -0700, Jim Langston napisał(a):
So if we call a float a real, does that mean we have to
call an int a fake?
unreal :>
--
SasQ This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
by: Marcus |
last post by:
I have a column in a MySQL database called price and of type FLOAT(8,2).
I then insert two rows into my table, one where price = 100.00 and one
where price = 100.01, and then try to find these...
|
by: Peter Scheurer |
last post by:
Hi,
we found some strange behavior when operating with floats and round().
The following simplified statement reproduces the problem.
select 6.56 - round(convert(float, 6.56), 2)
from...
|
by: Mark |
last post by:
What are the best .NET datatypes to handle SQL Server's Float and Real
datatypes? I'd like to avoid using the SQL Server specific datatypes like
SqlInt32 or similar.
Thanks in advance.
-Mark
|
by: bearophileHUGS |
last post by:
sys.maxint gives the largest positive integer supported by Python's
regular integer type. But maybe such attribute, with few others (they
can be called min and max) can be given to int type itself....
|
by: Dilip |
last post by:
Recently in our code, I ran into a situation where were stuffing a
float inside a double. The precision was extended automatically
because of that. To make a long story short, this caused...
|
by: JDT |
last post by:
Hi,
It seems that using floats as the first tupelo for an STL map (shown
below) can cause problems but I don't remember what the problems were.
Is it common practice to use a structure like...
|
by: Toe001 |
last post by:
In a program for use with a micro, I have a variable of type float (real number) and wish to save it to EEPROM. I have a routine which writes a byte at a time to EEPROM at the location (address) I...
|
by: d major |
last post by:
I was very puzzled about the conversion between float and long, I
cann't understand why a long val can convert to a float, as the below
codes show:
typedef unsigned long u_long;
float val =...
|
by: Bill Reid |
last post by:
I just noticed that my "improved" version of sscanf() doesn't assign
floating point numbers properly if the variable assigned to is declared
as a "float" rather than a "double". (This never...
|
by: Naresh1 |
last post by:
What is WebLogic Admin Training?
WebLogic Admin Training is a specialized program designed to equip individuals with the skills and knowledge required to effectively administer and manage Oracle...
|
by: Oralloy |
last post by:
Hello Folks,
I am trying to hook up a CPU which I designed using SystemC to I/O pins on an FPGA.
My problem (spelled failure) is with the synthesis of my design into a bitstream, not the C++...
|
by: Carina712 |
last post by:
Setting background colors for Excel documents can help to improve the visual appeal of the document and make it easier to read and understand. Background colors can be used to highlight important...
|
by: BLUEPANDA |
last post by:
At BluePanda Dev, we're passionate about building high-quality software and sharing our knowledge with the community. That's why we've created a SaaS starter kit that's not only easy to use but also...
|
by: Rahul1995seven |
last post by:
Introduction:
In the realm of programming languages, Python has emerged as a powerhouse. With its simplicity, versatility, and robustness, Python has gained popularity among beginners and experts...
|
by: Johno34 |
last post by:
I have this click event on my form. It speaks to a Datasheet Subform
Private Sub Command260_Click()
Dim r As DAO.Recordset
Set r = Form_frmABCD.Form.RecordsetClone
r.MoveFirst
Do
If...
|
by: ezappsrUS |
last post by:
Hi,
I wonder if someone knows where I am going wrong below. I have a continuous form and two labels where only one would be visible depending on the checkbox being checked or not. Below is the...
|
by: jack2019x |
last post by:
hello, Is there code or static lib for hook swapchain present?
I wanna hook dxgi swapchain present for dx11 and dx9.
|
by: DizelArs |
last post by:
Hi all)
Faced with a problem, element.click() event doesn't work in Safari browser.
Tried various tricks like emulating touch event through a function:
let clickEvent = new Event('click', {...
| | |
