# Round number

The round(x,n) method returns a rounded number x to n decimals.
The arguments:

• x : number to round
• n : number of decimals
```#!/usr/bin/python   x = round(1.5056, 2) print(x)```

which would return 1.06

### Rounding errors

You would probably round 1.85, 2.85, 3.85, 4.85 and 5.85 up, right? If you try this in a computer you won’t get that result:

```print( round(1.85, 1) ) print( round(2.85, 1) ) print( round(3.85, 1) ) print( round(4.85, 1) ) print( round(5.85, 1) ) print( round(6.85, 1) )```

Decimal places are not exact in a computer system, which uses base 2 instead of base 10. You can view the value that round returns with the Decimal module:

```#!/usr/bin/python from decimal import Decimal   print( Decimal(1.85) ) print( Decimal(2.85) ) print( Decimal(3.85) ) print( Decimal(4.85) ) print( Decimal(5.85) ) print( Decimal(6.85) )```

It will print the values that are stored in the computer memory. You might be surprised. These numbers are called floating points.

### Round to the nearest number

Round up
If you want all floating points to be rounded up, use the math.ceil(x) method instead:

```#!/usr/bin/python import math   print( math.ceil(2.5) )```

Round down
If you want a floating point to be rounded down, you could use

```#!/usr/bin/python import math   print( math.floor(2.5) )```