LOOPS - Introduction to Java Programming: Comprehensive Version - page 173

for ( ; ; ) {
// Do something
}

for ( ; true ; ) {
// Do something
}

while ( true ) {
// Do something
}

Equivalent

Equivalent

This is better

(a) (b) (c)

5.8

✓ ✓

Do the following two loops result in the same value in sum ?

Check

Point

for ( int i = 0 ; i < 10 ; ++i) {
sum += i;
}

for ( int i = 0 ; i < 10 ; i++) {
sum += i;
}

(a) (b)

5.9

What are the three parts of a for loop control? Write a for loop that prints the num-
bers from 1 to 100 .

5.10

Suppose the input is 2 3 4 5 0 . What is the output of the following code?

import java.util.Scanner;

public class Test {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);

int number, sum = 0 , count;

for (count = 0 ; count < 5 ; count++) {
number = input.nextInt();
sum += number;
}

System.out.println( "sum is " + sum);
System.out.println( "count is " + count);
}
}

5.11

What does the following statement do?

for ( ; ; ) {
// Do something

}

5.12

If a variable is declared in a for loop control, can it be used after the loop exits?

5.13

Convert the following for loop statement to a while loop and to a do-while loop:

long sum = 0 ;
for ( int i = 0 ; i <= 1000 ; i++)
sum = sum + i;

5.14

Count the number of iterations in the following loops.

int count = 0 ;
while (count < n) {
count++;
}

for ( int count = 0 ;
count <= n; count++) {
}

(a) (b)