How to Check if Package is Installed in Julia?

To check if a package is installed in Julia, you can use the Pkg.dependencies function, which returns a dictionary of installed packages and their versions. You can then use the in keyword to check if a specific package is in the dictionary.

Check if Package is Installed in Julia Examples

For example, to check if the LinearAlgebra package is installed, you could use the following code:

# Check if the LinearAlgebra package is installed
if "LinearAlgebra" in keys(Pkg.dependencies())
    println("The LinearAlgebra package is installed.")
else
    println("The LinearAlgebra package is not installed.")
end

Here is the output of this code:

The LinearAlgebra package is installed.

These are just a few examples of how to check if a package is installed in Julia. For more information, I would recommend checking out the documentation for the Pkg module.

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