Java: flow of control looping
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1. What is the output of this code sequence? (The user successively enters 3, 5, and -1.)
System.out.print( "Enter an int > " );
int i = scan.nextInt( );
while ( i !=-1 )
{
System.out.println( "Hello" );
System.out.print( " Enter an int > " );
i = scan.nextint ( );
}
2. what are the values of i and product after this code sequence is executed?
int i=6;
int product =1;
do
{
product *=i;
i++;
}while ( i <9 );
3. What is the output of this code sequence?
for ( int i = 0; i <3; i++ )
System.out.println( "Hello" );
System.out.println( " Done" );
4. What are the values of i and sum after this code sequence is executed?
int i = 0;
int sum = 0;
for ( i =0; i < 5; i++ )
{
sum += i;
}
5. What is the value of sum after this code sequence is executed?
int sum = 0;
for ( int i = 1; i < 10; i++ )
{
i++;
sum += i;
}
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Solution Summary
The solution not only provides the output of code execution, but it also explains why that output will come.
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1. The output of given code sequence would be below 5 lines. First line would be printed due to code before the loop. Loop will execute 2 times, one for user input 3, and second time for user input 5.
Enter an int >
Hello
Enter an int >
Hello
Enter an int >
2. Loop will execute for the values ...
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