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Assignment statements
Assignment statements assign a value to a variable. The general form is:
<variable> = <expression>;
In general the type of the expression need not be the same as the type
of the variable, but there are complex rules covering the automatic
conversions which occur. A straightforward example is that int
values can be assigned directly to floats. If a float
value is assigned directly to an int variable it will be
converted into an integer, usually by truncation not rounding.
