# On the output value of JuMP
**URL:** https://discourse.julialang.org/t/on-the-output-value-of-jump/44084
**Category:** Optimization (Mathematical)
**Tags:** question
**Created:** [August 1, 2020, 1:41pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084 "2020-08-01T13:41:17Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@dty](https://discourse.julialang.org/u/dty)
#### Post date: [August 1, 2020, 1:41pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/1 "2020-08-01T13:41:17Z")
How to output the value of my decision variable in workspace？
I tried to use value at the end of the program, but it didn’t work. At present, the effective way is to write value() one by one in repl.
---
### Author:  [@Henrique\_Becker](https://discourse.julialang.org/u/Henrique_Becker)
#### Post date: [August 1, 2020, 2:05pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/2 "2020-08-01T14:05:21Z")
If each variable is a single value (not an array of values), I think the best way is (maybe):
```julia
for variable in all_variables(model)
println("$(name(variable)) = $(value(variable))")
end
```
Also, maybe you wanna put it inside an `if` too, to avoid printing the zero-valued variables.
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### Author:  [@dty](https://discourse.julialang.org/u/dty)
#### Post date: [August 1, 2020, 2:09pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/3 "2020-08-01T14:09:57Z")
What if the variables in matrix form need to be output？
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### Author:  [@Henrique\_Becker](https://discourse.julialang.org/u/Henrique_Becker)
#### Post date: [August 1, 2020, 2:23pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/4 "2020-08-01T14:23:30Z")
My first reply will work if some variables are, in fact, vectors or matrices of variables. But, then, maybe you wanna do something special to improve the visualization, I mean. Using that loop you will get:
```julia
scalar_name = its_value
matrix[1, 1] = its_value
matrix[1, 2] = its_value
...
scalar_name = its_value
```
The order will be by creation time (unless you start to fiddle with the JuMP containers yourself).
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### Author:  [@martincornejo](https://discourse.julialang.org/u/martincornejo)
#### Post date: [August 1, 2020, 2:37pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/5 "2020-08-01T14:37:09Z")
Assign the value to some variable `PGD_EX_opt = value(PGD_EX)`
> [@dty](#):
>
> What if the variables in matrix form need to be output
In that case don’t forget to use the `.` broadcast in `value`
```julia
M_opt = value.(M)
```
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### Author:  [@abelsiqueira](https://discourse.julialang.org/u/abelsiqueira)
#### Post date: [August 1, 2020, 3:03pm UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/6 "2020-08-01T15:03:02Z")
If your decision variable is a vector use value.(variable)
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### Author:  [@dty](https://discourse.julialang.org/u/dty)
#### Post date: [August 3, 2020, 9:21am UTC](https://discourse.julialang.org/t/on-the-output-value-of-jump/44084/7 "2020-08-03T09:21:35Z")
that’s right! thankyou!