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Questions tagged [integer]

Common datatype in many programming languages for representing both negative and non-negative whole numbers. Use this tag for questions about using, storing, or manipulating integers. For 64-bit integers, use the [long-integer] tag instead.

An integer is a whole number that can be negative, positive, or zero. For example, -2, -1, 0, 1, 2. In many programming languages, the integer data type is commonly represented as 32-bits, but may also be 64-bits (Usually referred to as the Long data type).

For 32-bit integers:

  • The signed range is : -2147483648 to 2147483647.
  • The unsigned range is : 0 to 4294967295.

For 64-bit integers:

  • The signed range is : -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.
  • The unsigned range is : 0 to 18,446,744,073,709,551,615.

For further reading, see the Wikipedia article on integers.

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How to generate a a really big Random integer in Ruby?

I want to generate a 64 bit integer in ruby. I know in Java you have longs, but I am not sure how you would do that in Ruby. Also, how many charecters are in a 64 bit number? Here is an example of what I am talking about... 123456789999. @num =…
user2351234
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Scipy fmin with integer solution

I need to minimize a function that only allows integer input. Can I solve it with scipy.optimize.fmin? Otherwise, is there any alternative?
Jorge Barata
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How Java processes for overflow integers

Now signed_int max value is 2,147,483,647 i.e. 2^31 and 1 bit is sign bit, so when I run long a = 2,147,483,647 + 1; It gives a = -2,147,483,648 as answer.. This hold good. But, 24*60*60*1000*1000 = 86400000000 (actually)... In java,…
Gru
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Integer min and max values

I am a newbie in programming. I was studying from a Java object programming book and performing the tutorials and examples on the book simultaneously on computer. In the book it says that the maximum and minimum value of integers…
user1948951
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MySQL integer unsigned arithmetic problems?

Does MySQL (5.0.45) like to do strange internal typecasts with unsigned maths? I am storing integers unsigned but when selecting basic arithmetic I get outrageous numbers: mysql> create table tt ( a integer unsigned , b integer unsigned , c float…
Jé Queue
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Use of integers and doubles give different answers when they shouldn't

I'm solving a Project Euler Problem 14 using java. I am NOT asking for help solving the problem. I have already solved it, but I ran into something I can't figure out. The problem is like this: The following iterative sequence is defined for the…
Goatcat
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().is_integer() not working

Whats wrong with this code: n = 10 ((n/3)).is_integer() I do not understand why I cannot set n = any number and check if it is an integer or not. Thanks for your help! python 2.7.4 error: Traceback (most recent call last): File…
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Counting Overlaps of Integer Ranges

I've been stumped on this algorithm for quite a bit. Say there are four ranges of integers. Each range has a Start and an End value. Range A: 0,5 Range B: 4,12 Range C: 2,10 Range D: 8,14 From these values I would like to get a new set which…
Sam Washburn
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Integer to Bit in SQL

I have an Integer field, and I need to divide it into Bits to the SQL(Firebird). For each byte of the Integer field should be a new field. For Example: Integer field: 7 = 00000111 Bit 1 field1: 1 Bit 2 field2: 1 Bit 3 field3: 1 Bit 4 Field4:…
Paulo H. Hartmann
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Put a 4 Byte Integer into the first 4 char elements of vector

I have a vector and want to put a 4 byte Integer into the first 4 elements. Is there a simpler way in C++ than masking like this: myVector.at(0) = myInt & 0x000000FF; myVector.at(1) = myInt & 0x0000FF00; myVector.at(2) = myInt &…
tzippy
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Finding integer distance between two intervals

I'm looking for an easy way to find the minimum distance between two integer intervals using python. For example, the minimum between [0,10] and [12,20] would be 2. If the two intervals overlap in any way, the distance would be 0. Any suggestions…
David M
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Algorithm speed with double and int?

how do algorithms with double compete compared to int values? Is there much difference, or is it neglectable? In my case, I have a canvas that uses Integers so far. But now as I'm implementing a scaling, I'm probably going to switch everything to…
membersound
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How to check std::string if its indeed an integer?

The following code converts an std::string to int and the problem lies with the fact that it cannot discern from a true integer or just a random string. Is there a systematic method for dealing with such a problem? #include #include…
pandoragami
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Cannot seem to add two integers in javascript?

Im building John Conways game of life with HTML5 canvas. It has a gameOfLife object which contains an array with all the cells and their states (dead/alive). Here is the code that builds a cell: function cell(x,y){ this.x = x; this.y = y; …
styke
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Sorting by integer value

I am writing a bash script and I am using ps -e -o %cpu command. I would like to have output of sorted %cpu values (descending). How to do that? I know that I should use sort command but I don't know how.
user1926550
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