Generally, the most useful nested if statement occurs when a second if-else statement is placed within the else part of an if-else statement.
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The compiler will, by default, associate an else with the closest previous unpaired if, unless braces are used to alter this default pairing.
Any number of case labels may be contained within a switch statement, in any order.
The expression: (6 * 3 == 36 / 2) && (13 < 3 * 3 + 4) || !(6 - 2 < 5) evaluates to 1.
The simplest C selection statement is the one-way if statement.