# Changing default printing options in JuMP

**URL:** <https://discourse.julialang.org/t/changing-default-printing-options-in-jump/1602>\
**Category:** Optimization (Mathematical)\
**Tags:** question\
**Created:** [January 20, 2017, 2:20am UTC](https://discourse.julialang.org/t/changing-default-printing-options-in-jump/1602 "2017-01-20T02:20:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![huckl3b3rry87](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/huckl3b3rry87/32/3163_2.png) [@huckl3b3rry87](https://discourse.julialang.org/u/huckl3b3rry87)\
**Post date:** [January 20, 2017, 2:20am UTC](https://discourse.julialang.org/t/changing-default-printing-options-in-jump/1602/1 "2017-01-20T02:20:59Z")

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Is there a way to change the default printing options? Specifically, I am using `getdual()` and it is returning values like `0.0` and I want to see more of this number

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<div class="post-metadata">

**Author:** ![rdeits](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rdeits/32/286_2.png) [@rdeits](https://discourse.julialang.org/u/rdeits)\
**Post date:** [April 14, 2017, 4:47am UTC](https://discourse.julialang.org/t/changing-default-printing-options-in-jump/1602/2 "2017-04-14T04:47:40Z")

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The `@printf` macro can be used to print numbers with an arbitrary number of decimal places. For example:

```julia
julia> x = 1e-10
1.0e-10

julia> @printf "%.16f" x
0.0000000001000000
julia> @printf "%.32f" x
0.00000000010000000000000000364322

```