How do I convert an integer to binary in JavaScript?
I’d like to see integers, positive or negative, in binary. Rather like this question, but for JavaScript.
numbers
How to print a number with commas as thousands separators in JavaScript
I used the idea from Kerry’s answer, but simplified it since I was just looking for something simple for my specific purpose. Here is what I have: Show code snippet The regex uses 2 lookahead assertions: a positive one to look for any point in the string that has a multiple of 3 digits in … Read more
What is 0x10 in decimal?
0x means the number is hexadecimal, or base 16. 0x10 is 16.
C++ – how to find the length of an integer
The number of digits of an integer n in any base is trivially obtained by dividing until you’re done:
Java Generate Random Number Between Two Given Values
You could use e.g. r.nextInt(101) For a more generic “in between two numbers” use: This gives you a random number in between 10 (inclusive) and 100 (exclusive)
What is the meaning of number 1e5?
1e5 is a number expressed using scientific notation and it means 10 to the 5th power (the e meaning ‘exponent’) so 1e5 is equal to 100000, both notations are interchangeably meaning the same.
how to convert negative hexadecimal to decimal
without using a computer you can calculate it like this: 0xFFFF FE58 is a negative number in 2’s complement. To get the absolute value you have to invert all bits and add 1 in binary. You also can subtract this number from the first number out of range (0x1 0000 0000) now we know that your … Read more
What’s the best way to convert a number to a string in JavaScript?
like this: Actually, even though I typically do it like this for simple convenience, over 1,000s of iterations it appears for raw speed there is an advantage for .toString() See Performance tests here (not by me, but found when I went to write my own): http://jsben.ch/#/ghQYR Fastest based on the JSPerf test above: str = num.toString(); It should be … Read more
Long vs Integer, long vs int, what to use and when?
Long is the Object form of long, and Integer is the object form of int. The long uses 64 bits. The int uses 32 bits, and so can only hold numbers up to ±2 billion (-231 to +231-1). You should use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.collections methods usually use the boxed (Object-wrapped) versions, because they need to work for any Object, and … Read more
What is the meaning of number 1e5?
1e5 is a number expressed using scientific notation and it means 10 to the 5th power (the e meaning ‘exponent’) so 1e5 is equal to 100000, both notations are interchangeably meaning the same.