This statement acts as a conditional control statement of Java and
checks the specified condition. If the given condition is true the given
instruction is executed otherwise the instruction is ignored. There are
different formats of if statement and is widely used for computation,
logical reasoning and decision making within a program.
A simple if statement has the following format :
if (expression)
statement1;
where an expression is the condition which if found true executes 
statement1 otherwise the control comes to the next statement. 
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