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typeof

typeof(x)

Get the concrete type of x.

Examples

1. Get the type of a variable:

   julia> x = 5;
   julia> typeof(x)
   Int64

   This example returns the concrete type Int64 of the variable x.

2. Check the type of a string:

   julia> str = "Hello, Julia!";
   julia> typeof(str)
   String

   It returns the concrete type String of the string variable str.

3. Determine the type of an array:

   julia> arr = [1, 2, 3, 4, 5];
   julia> typeof(arr)
   Array{Int64,1}

   It returns the concrete type Array{Int64,1} of the array arr.

Common mistake example:

julia> typeof(10, 20, 30)
ERROR: MethodError: no method matching typeof(::Int64, ::Int64, ::Int64)

In this example, the typeof function is mistakenly used with multiple arguments. The typeof function expects only one argument, so ensure that you pass a single value or variable to it.

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