# Template:Round/doc

This templates rounds parameter 1 to the number of digits after the point optionally given as parameter 2. If parameter 2 is negative, rounding is to a multiple of 10. If parameter 2 is undefined, numbers with 4 digits before the point are rounded to integers, numbers with 3 digits before the point are rounded to 1 digit after the point, numbers with 2 digits before the point are rounded to 2 digits after the point, and numbers with 1 digit before the point or none are rounded to 3 digits after the point.

In other words, if parameter 2 is undefined, rounding is to 4 significant digits, except that it is not cruder than rounding to an integer and not finer than rounding to three digits after the decimal point.

Examples:

Note that trailing zeros are not shown, so rounding can seem cruder than has actually been applied:

While this is a limitation of the template (normally there would be trailing zeros to show the precision), there is also the general problem that if a number is an integer with trailing zeros, then the precision is not clear:

• {{roundup}}
• {{rounddown}}
• {{decimals}} – acts like rounding but displays trailing zeros after the decimal point
• {{precision}} – handles rounding of large numbers, too, like "349,030,293" → "349,030,000", "349,000,000", or "350,000,000"

## TemplateData

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TemplateData for Round

This templates rounds a value to the optionally given number of digits after the point.

Template parameters

ParameterDescriptionTypeStatus
Value`1`

The value to be rounded

Example
3.14159265
Numberrequired
Number of digits`2`

Number of digits after the point. If negative, rounding is to a multiple of 10. If undefined, numbers with 4 digits before the point are rounded to integers, numbers with 3 digits before the point are rounded to 1 digit after the point, numbers with 2 digits before the point are rounded to 2 digits after the point, and numbers with 1 digit before the point or none are rounded to 3 digits after the point.

Example
2
Numberoptional