Static Typing VS Dynamic Typing: The Difference Explained

You’ve in all probability heard the phrases “static typing” and “dynamic typing” thrown round in discussions of programming languages. However what do they imply, and why is it necessary to know?

To know the distinction between static and dynamic typing, let’s first discuss kind checking. Kind checking is a course of utilized by compilers or interpreters to make sure that a program is written with right syntax for every language. Static kind checking will determine any errors if you’re writing code utilizing a compiler, whereas dynamic kind checking will determine any errors at runtime.

What’s Static Typing?

Static typing is a conference utilized in many programming languages that defines the kind of variable within the code. The kind of a variable is decided at compile time(the interval when the programming code is transformed to the machine code).

Static typing might be helpful for builders as a result of it permits them to extra simply perceive the code they’re writing and it will probably assist them to forestall errors. Examples of statically typed programming languages embody C, Java, C++,Scala, and so on…

In easy phrases, Static typing means you inform the pc what kind of knowledge is in this system earlier than this system begins.

Instance in Java:

String x = “Good day world!”; // x is a string
int y = 15;  // y is an integer
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Benefits of Static Typing

Kind security might help stop unintended kind conversions (for instance, between numeric sorts), which may produce incorrect outcomes or trigger runtime errors.
Static typing makes it simpler for a brand new developer to know and modify present code, because the anticipated sorts of every variable can simply be decided by means of evaluation of the supply code itself.
It may well assist detect bugs earlier within the improvement cycle. The compiler or interpreter checks for kind errors earlier than working your code. This implies you’ll find errors at compile time as a substitute of being shocked at runtime when your code crashes.

What’s Dynamic Typing?

Dynamic typing, a method utilized in many programming languages and instruments, is a technique of figuring out the kind of knowledge being saved at runtime (i.e., when code is working). In distinction to static typing, the place all variables are typed forward of time and stay fixed all through a program’s execution, dynamic typing permits the info kind of a variable to alter throughout execution. This may be helpful as a result of it permits programmers to retailer various kinds of knowledge in the identical variable; nonetheless, it will probably additionally result in sudden errors in code.

In easy phrases, Dynamic typing is a sort of typing the place you don’t must resolve what the kind of a variable is if you make the variable.

Examples of dynamically typed programming languages embody JavaScript,Python, PHP,Ruby, and so on…

Instance in Python:

$ title = “John Doe” // $title is now of kind string
$ age = 15; // $age is now an integer
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Benefits of Dynamic Typing

Simpler to write down. Declaring variable sorts could be a ache, particularly in multi-line statements when you could declare the identical kind a number of occasions.
Simpler to refactor code. Renaming variables which are dynamically typed doesn’t require altering their declaration or kind annotation; with static typing, you would need to change all references within the codebase for the variable’s kind.
Sooner improvement time. With no need to declare variable sorts, you’ll be able to merely begin coding after which run your code.


Static typing is undeniably highly effective, with its means to keep away from runtime errors. Dynamic typing is simpler to combine, and doesn’t require intensive adjustments to present code. Which one wins? It relies on the way you wish to method your venture. Select properly — the kind system you select immediately can have an effect on your code for years to return.

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