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In nested if-else decision-making statement, an if-else statement is nested inside an if statement, hence this program control structure is named nested if-else.

Working of nested if-else

If the condition of outer if statement is false then the statement connected to its else(optionally declared) part is executed and the nested if-else statement is not executed at all.

The statement connected to the if of the nested if-else is only executed when -:

• The condition of its outer if statement is true and,
• The condition of this nested if statement is also true.

If condition of this nested if is false then the statement with its connected else is executed.

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Nested if-else example

//nested if-else example

public class NestedIfElse
{

public static void main(String... ar)
{

if(99<100)
{
	if(99<98)
		System.out.println("99 is less than 100 & 99 is also less than 101");
	else
		System.out.println("99 is less than 100 but 99 is not less than 98");
}

else 
	System.out.println("99 is not less than 100");

}

}

Output

99 is less than 100 but it is not less than 98

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