# Format a float number with specific number of decimal point

**URL:** <https://www.ruby-forum.com/t/format-a-float-number-with-specific-number-of-decimal-point/76501>\
**Category:** Ruby\
**Created:** [November 19, 2006, 6:45pm UTC](https://www.ruby-forum.com/t/format-a-float-number-with-specific-number-of-decimal-point/76501 "2006-11-19T18:45:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![oscarlok](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/ea666f/32.png) [@oscarlok](https://www.ruby-forum.com/u/oscarlok)\
**Post date:** [November 19, 2006, 6:45pm UTC](https://www.ruby-forum.com/t/format-a-float-number-with-specific-number-of-decimal-point/76501/1 "2006-11-19T18:45:46Z")

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Hi,  
May I know that how to format a float number with specific number of  
decimal point, please?  
e.g :–  
123.456789 to 123.4568  
123.123321 to 123.1233

Thanks  
Regards  
Oscar

---

<div class="post-metadata">

**Author:** ![oscarlok](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/o/ea666f/32.png) [@oscarlok](https://www.ruby-forum.com/u/oscarlok)\
**Post date:** [November 19, 2006, 7:01pm UTC](https://www.ruby-forum.com/t/format-a-float-number-with-specific-number-of-decimal-point/76501/2 "2006-11-19T19:01:06Z")

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Oscar L. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) writes:

> Hi,  
> May I know that how to format a float number with specific number of  
> decimal point, please?  
> e.g :–  
> 123.456789 to 123.4568  
> 123.123321 to 123.1233

irb(main):039:0\> print [123.456789, 123.123321].collect {|x|  
format(“#{x} to %.4f\n”,x)}  
123.456789 to 123.4568  
123.123321 to 123.1233  
=\> nil  
irb(main):040:0\>