Julia: Specifying type of variable

Julia is dynamically typed language, so you no need to specify the type of a variable. But in some cases, if you specify the type of a variable it improves the performance drastically. If you write type-stable code in your application, it improves the performance drastically. So Julia provides option to specify the type of a variable (It is optional).

What is type-stable code?

Code is said to be type-stable, if the type of every variable in application doesn’t vary over time.

Syntax to specify type of variable
variable_name::type

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