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Suppose that you want to execute more than one statement when an
if or if-else statement's Boolean expression is true or not
true. You need only to combine the multiple statements, using braces,
into a single compound statement.
{statement 1
...
statement n}
In the following if-else statement, for example, you not only want
to display a message when the value of ratio is above 30, but
also want to assign 1 to a suitable variable so as to record that
the ratio has gone above the threshold of 30:
if (ratio > 30) {
high_ratio_switch = 1;
printf ("It is expensive! High ratio switch set to %i.\n",
high_ratio_switch);
}