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I will give examples in the Java language.

Assign a value to a variable, with the equal sign. For example, if you want the variable "a" to have the value 5:

int a;
a = 5;

Note that the first sentence declares the variable, this has to be done only once. After that, you can assign values to the variable several times; each value you assign will erase the previous value.

The declaration and the assignment can be combined, thus:

int a = 5;

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