18 lines
1.1 KiB
HTML
18 lines
1.1 KiB
HTML
<p>
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Variables are used to store values. Basically you have a <b>storage location</b> with a <b>name</b> and an <b>associated type</b>.
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The compiler will check, if the value you assign to the variable is from the same type as the variable.
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If not, it will throw an error.
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</p>
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<p>
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That is because C is a <b>statically type checked language</b>. Dynamically type checked languages may let you use your variables more freely,
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but will also hide bugs, which can produce unpredictable results. It is a small price to pay, to
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build a more robust code, which is immune to this kind of bugs, if you don't miss use type casting.
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</p>
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<p>
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Because variables just refer to a space in memory, you can easily change the value to a new one.
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The thing that you can't change is the type.
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Sometimes you just want to have a name for a constant value. In C you can use the <b>const</b> keyword to declare
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a variable as constant, i.e you cant change the value once it is assigned.
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If you know the value isn't supposed to change, you should declare it const to prevent bugs, which you could be a pain to find.
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</p>
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