The conditional statements use relational operators, which have been explained in the third chapter.
The relational operators are useful for comparing the two values. They can be used to check whether
they are equal to each other, unequal or which one is smaller/greater than the other.
5.2 THE if STATEMENT
C uses the keyword i f to execute a set of command lines or one command line when the logical
condition is true. It has only one option. The set of command lines or command lines are executed
only when the logical condition is true.
Syntax for the simplest if statement
If (condition ) /* no semi-colon ...
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