Rounding Up to the Second Decimal Place

How to round to 2 decimals with Python?

You can use the round function, which takes as its first argument the number and the second argument is the precision after the decimal point.

In your case, it would be:

answer = str(round(answer, 2))

Rounding up to the second decimal place

Check out http://www.php.net/manual/en/function.round.php

<?php

echo round(3.6451895227869, 2);

?>

EDIT
Try using this custom function http://www.php.net/manual/en/function.round.php#102641

<?php 
function round_up ( $value, $precision ) { 
    $pow = pow ( 10, $precision ); 
    return ( ceil ( $pow * $value ) + ceil ( $pow * $value - ceil ( $pow * $value ) ) ) / $pow; 
} 

echo round_up(3.63333333333, 2);  // 3.64

?>

PHP to round up to the 2nd decimal place

You can use 2 functions:

• round() - docs here: http://www.php.net/manual/en/function.round.php
• number_format() - docs here: http://ro1.php.net/number_format

I've used both with success, and depending on what you're doing with the result, you may chose either of the above functions.

Later edit: If you want to only round up, you can use ceil() - http://www.php.net/manual/en/function.ceil.php + number format or round

echo round(ceil($number*100)/100,2);

As another user suggested earlier

round up to 2 decimal places in java?

Well this one works...

double roundOff = Math.round(a * 100.0) / 100.0;

Output is

123.14

Or as @Rufein said

 double roundOff = (double) Math.round(a * 100) / 100;

this will do it for you as well.

How to round to at most 2 decimal places, if necessary

Use Math.round() :

Math.round(num * 100) / 100

Or to be more specific and to ensure things like 1.005 round correctly, use Number.EPSILON :

Math.round((num + Number.EPSILON) * 100) / 100

Rounding to the second decimal place in python

You can use the built-in round function to round a number to up to 2 decimal places. Seems like you only need to include this in the milesToKilometers and kilometers to miles functions.

def milesToKilometers(miles):
    mileConverstion = miles * 1.60934
    return round(mileConverstion, 2)

def kilometersToMiles(kilometers):
    kilometerConverstion = kilometers * 0.621371
    return round(kilometerConverstion, 2)

Note: If you want the output to keep the trailing zeros e.g. 2.10, you need to convert it into a string as numerical values omit trailing zeros. You can convert to a string like this:

with_decimals = f'{round(number, 2):.2f}'

Formatting a number with exactly two decimals in JavaScript

To format a number using fixed-point notation, you can simply use the toFixed method:

(10.8).toFixed(2); // "10.80"

var num = 2.4;
alert(num.toFixed(2)); // "2.40"

Note that toFixed() returns a string.

IMPORTANT: Note that toFixed does not round 90% of the time, it will return the rounded value, but for many cases, it doesn't work.

For instance:

2.005.toFixed(2) === "2.00"

UPDATE:

Nowadays, you can use the Intl.NumberFormat constructor. It's part of the ECMAScript Internationalization API Specification (ECMA402). It has pretty good browser support, including even IE11, and it is fully supported in Node.js.

const formatter = new Intl.NumberFormat('en-US', {
   minimumFractionDigits: 2,      
   maximumFractionDigits: 2,
});

console.log(formatter.format(2.005)); // "2.01"
console.log(formatter.format(1.345)); // "1.35"

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