They are the same for almost all purposes. At one time different vendors used different names (NUMERIC/DECIMAL) for almost the same thing. SQL-92 made them the same with one minor difference which can be vendor specific: NUMERIC must be exactly as precise as it is defined — so if you define 4 decimal places to … Read more
You’re looking for toFixed: var x = 4.3455; alert(x.toFixed(2)); // alerts 4.35 — not what you wanted! …but it looks like you want to truncate rather than rounding, so: var x = 4.3455; x = Math.floor(x * 100) / 100; alert(x.toFixed(2)); // alerts 4.34
If you don’t add .0f it will be treated like it is an integer, and an integer division is a lot different from a floating point division indeed 🙂 float percent = (n * 100.0f) / v; If you need an integer out of this you can of course cast the float or the double … Read more
Floating point arithmetic will almost always be significantly faster because it is supported directly by the hardware. So far almost no widely used hardware supports decimal arithmetic (although this is changing, see comments). Financial applications should always use decimal numbers, the number of horror stories stemming from using floating point in financial applications is endless, … Read more
1.2 + 1.1 may be ok but 0.2 + 0.1 may not be ok. This is a problem in virtually every language that is in use today. The problem is that 1/10 cannot be accurately represented as a binary fraction just like 1/3 cannot be represented as a decimal fraction. The workarounds include rounding to … Read more
decimal is not a magical do all the maths for me type. It’s still a floating point number – the main difference from float is that it’s a decimal floating point number, rather than binary. So you can easily represent 0.3 as a decimal (it’s impossible as a finite binary number), but you don’t have … Read more
This can work: floor($number * 100) / 100
function decimalPlaces(num) { var match = (”+num).match(/(?:\.(\d+))?(?:[eE]([+-]?\d+))?$/); if (!match) { return 0; } return Math.max( 0, // Number of digits right of decimal point. (match[1] ? match[1].length : 0) // Adjust for scientific notation. – (match[2] ? +match[2] : 0)); } The extra complexity is to handle scientific notation so decimalPlaces(‘.05’) 2 decimalPlaces(‘.5’) 1 decimalPlaces(‘1’) … Read more
Just create a string out of it. myinteger = 212345 number_string = str(myinteger) That’s enough. Now you can iterate over it: for ch in number_string: print ch # will print each digit in order Or you can slice it: print number_string[:2] # first two digits print number_string[-3:] # last three digits print number_string[3] # forth … Read more
What you are seeing is a marketing stunt. Since non-technical people don’t know the difference between Metric Meg, Gig, etc. against the binary Meg, Gig, etc. marketers for storage will use the Metric calculation, thus 1000 Bytes == 1 KiloByte. This can cause issues with development or highly technical people so you get the idea … Read more