# Checking number in String

**URL:** <https://discourse.julialang.org/t/checking-number-in-string/21714>\
**Category:** General Usage\
**Tags:** question\
**Created:** [March 10, 2019, 8:17pm UTC](https://discourse.julialang.org/t/checking-number-in-string/21714 "2019-03-10T20:17:24Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![yash](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/yash/32/8353_2.png) [@yash](https://discourse.julialang.org/u/yash)\
**Post date:** [March 10, 2019, 8:17pm UTC](https://discourse.julialang.org/t/checking-number-in-string/21714/1 "2019-03-10T20:17:24Z")

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How to know if the string is number of not?  
example:  
str = “1234”  
This string is numeric.

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<div class="post-metadata">

**Author:** ![Tamas\_Papp](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tamas_papp/32/25949_2.png) [@Tamas\_Papp](https://discourse.julialang.org/u/Tamas_Papp)\
**Post date:** [March 10, 2019, 8:26pm UTC](https://discourse.julialang.org/t/checking-number-in-string/21714/2 "2019-03-10T20:26:30Z")

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Depends on what you recognize as a number (integers, floats, various representations of the latter), but variations

```julia
is_number(str) = tryparse(Float64, str) ≠ nothing

```

could be a good start.