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19.11 Null Statement

A null statement is just a semicolon. It does nothing.

A null statement is a placeholder for use where a statement is grammatically required, but there is nothing to be done. For instance, sometimes all the work of a for-loop is done in the for-header itself, leaving no work for the body. Here is an example that searches for the first newline in array:

for (p = array; *p != '\n'; p++)