# Convert 1-element Vector{Float64} in Float

**URL:** <https://discourse.julialang.org/t/convert-1-element-vector-float64-in-float/71242>\
**Category:** Performance\
**Tags:** question\
**Created:** [November 10, 2021, 4:30am UTC](https://discourse.julialang.org/t/convert-1-element-vector-float64-in-float/71242 "2021-11-10T04:30:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Sbeltranj](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sbeltranj/32/32827_2.png) [@Sbeltranj](https://discourse.julialang.org/u/Sbeltranj)\
**Post date:** [November 10, 2021, 4:30am UTC](https://discourse.julialang.org/t/convert-1-element-vector-float64-in-float/71242/1 "2021-11-10T04:30:07Z")

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Hi I want to convert a vector of 1 element, to a Float64, how to do it ![float](https://global.discourse-cdn.com/julialang/original/3X/9/8/9878b98e1b8724877e6a9232477aa28b08a6c760.png)

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<div class="post-metadata">

**Author:** ![Oscar\_Smith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oscar_smith/32/25343_2.png) [@Oscar\_Smith](https://discourse.julialang.org/u/Oscar_Smith)\
**Post date:** [November 10, 2021, 4:33am UTC](https://discourse.julialang.org/t/convert-1-element-vector-float64-in-float/71242/2 "2021-11-10T04:33:01Z")

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use `only` or `first` to extract the element from the vector. That said, you should generally use `Vector`s instead of a `1xn` `Matrix`

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<div class="post-metadata">

**Author:** ![DNF](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dnf/32/10191_2.png) [@DNF](https://discourse.julialang.org/u/DNF)\
**Post date:** [November 10, 2021, 7:01am UTC](https://discourse.julialang.org/t/convert-1-element-vector-float64-in-float/71242/4 "2021-11-10T07:01:29Z")

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Or you can just directly index the element:

```julia
cargas_aplica[begin, 2]

```