# Calling a variable in println

**URL:** <https://discourse.julialang.org/t/calling-a-variable-in-println/122168>\
**Category:** General Usage\
**Created:** [November 2, 2024, 11:29am UTC](https://discourse.julialang.org/t/calling-a-variable-in-println/122168 "2024-11-02T11:29:51Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![hack3rcon](https://avatars.discourse-cdn.com/v4/letter/h/96bed5/32.png) [@hack3rcon](https://discourse.julialang.org/u/hack3rcon)\
**Post date:** [November 2, 2024, 11:29am UTC](https://discourse.julialang.org/t/calling-a-variable-in-println/122168/1 "2024-11-02T11:29:51Z")

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Hello,  
I want to multiply the numbers 1 to 12 by 2. How can I change the following code so that this operation happens in println?

```julia
for a=1 : 12
    println("$a * 2")
end

```

Thank you.

---

<div class="post-metadata">

**Author:** ![kellertuer](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/kellertuer/32/220707_2.png) [@kellertuer](https://discourse.julialang.org/u/kellertuer)\
**Post date:** [November 2, 2024, 11:32am UTC](https://discourse.julialang.org/t/calling-a-variable-in-println/122168/2 "2024-11-02T11:32:11Z")

</div>

You can execute stuff by using `$(...)` before interpolation like

```julia
for a=1 : 12
    println("$(2*a)")
end

```

or to just complete your example this would print actually both

```julia
for a=1 : 12
     println("2 * $(a) = $(2*a)")
end

```

---

<div class="post-metadata">

**Author:** ![stevengj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stevengj/32/71_2.png) [@stevengj](https://discourse.julialang.org/u/stevengj)\
**Post date:** [November 2, 2024, 12:24pm UTC](https://discourse.julialang.org/t/calling-a-variable-in-println/122168/3 "2024-11-02T12:24:57Z")

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> [@hack3rcon](#):
>
> `println("$a * 2")`

Or just `println(a * 2)`. The argument to `println` doesn’t need to be a string.

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<div class="post-metadata">

**Author:** ![hack3rcon](https://avatars.discourse-cdn.com/v4/letter/h/96bed5/32.png) [@hack3rcon](https://discourse.julialang.org/u/hack3rcon)\
**Post date:** [November 3, 2024, 7:01am UTC](https://discourse.julialang.org/t/calling-a-variable-in-println/122168/4 "2024-11-03T07:01:26Z")

</div>

Hello,  
Thank you so much.