A negative number is a number that is less than 0. It is signified by a preceding hyphen (i.e. -12,345).
This tag should be used for any questions dealing specifically with negative numbers.
Questions tagged [negative-number]
599 questions
44
votes
3 answers
HashCode giving negative values
I am converting the incoming string into hash code by doing the following function but some of the values are negative. I don't think hash values should be negative. Please tell me what I am doing wrong.
int combine = (srcadd + dstadd + sourceport +…
Xara
- 8,748
- 16
- 52
- 82
43
votes
6 answers
Right shifting negative numbers in C
I have C code in which I do the following.
int nPosVal = +0xFFFF; // + Added for ease of understanding
int nNegVal = -0xFFFF; // - Added for valid reason
Now when I try
printf ("%d %d", nPosVal >> 1, nNegVal >> 1);
I get
32767 -32768
Is this…
Alphaneo
- 12,079
- 22
- 71
- 89
40
votes
4 answers
how to convert negative integer value to hex in python
I use python 2.6
>>> hex(-199703103)
'-0xbe73a3f'
>>> hex(199703103)
'0xbe73a3f'
Positive and negative value are the same?
When I use calc, the value is FFFFFFFFF418C5C1.
nic nic
- 413
- 1
- 4
- 4
40
votes
2 answers
Why is the sign different after subtracting unsigned and signed?
unsigned int t = 10;
int d = 16;
float c = t - d;
int e = t - d;
Why is the value of c positive but e negative?
Eugene Kolombet
- 331
- 3
- 5
40
votes
3 answers
How to change a negative number to zero in python without using decision structures
I have a program that determines the number of points you get per day, for 5 days from an event.
source code:
total=0
for x in range (5):
points=int(input('How many points did you get today?'))
total=total+points
print ('You got {0}…
user1686896
- 483
- 1
- 5
- 9
38
votes
7 answers
Python Argparse: Issue with optional arguments which are negative numbers
I'm having a small issue with argparse. I have an option xlim which is the xrange of a plot. I want to be able to pass numbers like -2e-5. However this does not work - argparse interprets this is a positional argument. If I do -0.00002 it works:…
Ger
- 958
- 1
- 8
- 11
32
votes
2 answers
storing negative value in mysql
How can I store negative value in mysql decimal? I have data from DMS to Decimal having negative values, so it is decimal and negative. So what can I use to store such value?
Hafiz
- 4,187
- 12
- 58
- 111
27
votes
2 answers
Format Negative numbers in parenthesis BUT NOT with $ symbol?
I have seen all over the internet to format a NEGATIVE double value with a parenthesis WITH a $ symbol ie. currency type.
I am looking for a .NET format string, to format
12345.67 = 12,345.67
-12345.67 = (12,345.67)
user715993
- 291
- 1
- 5
- 8
27
votes
3 answers
Java: right shift on negative number
I am very confused on right shift operation on negative number, here is the code.
int n = -15;
System.out.println(Integer.toBinaryString(n));
int mask = n >> 31;
System.out.println(Integer.toBinaryString(mask));
And the result…
Cacheing
- 3,431
- 20
- 46
- 65
26
votes
4 answers
Representation of negative numbers in C?
How does C represent negative integers?
Is it by two's complement representation or by using the MSB (most significant bit)?
-1 in hexadecimal is ffffffff.
So please clarify this for me.
1s2a3n4j5e6e7v
- 1,243
- 3
- 15
- 29
22
votes
5 answers
Java Integer.MIN_VALUE's negative then compare yields two negatives
I have a test tomorrow and I can't understand my books explanation, I appreciate the help:
public class TestClass{
public static void main(String[] args) throws Exception{
int a = Integer.MIN_VALUE;
int b = -a;
…
Quinma
- 1,436
- 2
- 17
- 39
21
votes
3 answers
C++: How can I return a negative value in main.cpp
As an assignment in school, we have to write a C++ program and returns different error codes in the main.
The problem is that we have to return -2 if a specific error occurs but I have no idea how to return a negative value.
For example:
int…
Michi Kampl
- 213
- 2
- 4
20
votes
5 answers
How to convert positive numbers to negative in Python?
I know that abs() can be used to convert numbers to positive, but is there somthing that does the opposite?
I have an array full of numbers which I need to convert to negative:
array1 = []
arrayLength = 25
for i in arrayLength:
…
Aya Noaman
- 334
- 1
- 2
- 12
18
votes
2 answers
Create a random number between -100 and 100 in JavaScript?
Possible Duplicate:
Generating random numbers in Javascript
I have the following code var randomnumber=Math.floor(Math.random()*101); that generates a random number for me between 1 and 100. What I would like to do is generate a random number…
Cool Guy Yo
- 5,910
- 14
- 59
- 89
18
votes
3 answers
How to efficiently compare the sign of two floating-point values while handling negative zeros
Given two floating-point numbers, I'm looking for an efficient way to check if they have the same sign, given that if any of the two values is zero (+0.0 or -0.0), they should be considered to have the same sign.
For instance,
SameSign(1.0, 2.0)…
François Beaune
- 4,270
- 7
- 41
- 65