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Get Number of Decimal Places with Javascript

Like this:

var val = 37.435345;
var countDecimals = function(value) {
    if (Math.floor(value) !== value)
value.toString().split(".")[1].length || 0;
    return 0;

Categories : Javascript

Related to : Get Number of Decimal Places with Javascript
How to use boost::format to zeropad a number where the number of decimal places is contained in a variable?
Maybe you can modify the formatter items using standard io manipulators: int n = 5; // or something else format fmt("%u"); fmt.modify_item(1, group(setw(n), setfill('0'))); With a given format, you can also add that inline: std::cout << format("%u") % group(std::setw(n), std::setfill('0'), 42); DEMO Live On Coliru #include <boost/format.hpp> #include <boost/format/group.hp

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How do I truncate floats to two decimal places in cheetah templates?
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RegExp to return decimal number with optional 2-4 decimal dights
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The expression you showed above, Math.pow(10, 2), actually evaluates to 100. But if you are given the string 1e+2, you can change it into 100 by calling parseFloat(): var s = '1e+2', // This is a string in scientific notation. x = parseFloat(s); // Here we convert it to the more widespread notation. document.write('"'+s+'" -> '+x); // Let's print out the values for testing pur

Categories : Javascript
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