# Initializing Dictionary and where syntax

**URL:** <https://discourse.julialang.org/t/initializing-dictionary-and-where-syntax/37467>\
**Category:** Performance\
**Created:** [April 12, 2020, 9:45pm UTC](https://discourse.julialang.org/t/initializing-dictionary-and-where-syntax/37467 "2020-04-12T21:45:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Holdmycoffee](https://avatars.discourse-cdn.com/v4/letter/h/a9a28c/32.png) [@Holdmycoffee](https://discourse.julialang.org/u/Holdmycoffee)\
**Post date:** [April 12, 2020, 9:45pm UTC](https://discourse.julialang.org/t/initializing-dictionary-and-where-syntax/37467/1 "2020-04-12T21:45:08Z")

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Is there any difference between

`Dict{T where T<: Real, Int64}()`

and

`Dict{Real, Int64}()` ?

---

<div class="post-metadata">

**Author:** ![fredrikekre](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/fredrikekre/32/1688_2.png) [@fredrikekre](https://discourse.julialang.org/u/fredrikekre)\
**Post date:** [April 12, 2020, 9:47pm UTC](https://discourse.julialang.org/t/initializing-dictionary-and-where-syntax/37467/2 "2020-04-12T21:47:51Z")

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No difference, you can verify that the types are equivalent:

```julia
julia> (T where T <: Real) === Real
true

```