ICSE Class 10 Computer Applications
Question 17 of 69
Iterative Constructs in Java — Question 17
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Question Question 13
Write three different programs using for, while, and do-while loops to find the product of series 3, 9, 12,... 30.
public class KBoatSeries
{
public static void main(String args[]) {
int pro = 1;
for(int i = 3, t = 1; i <= 30; t++) {
pro *= i;
if(t % 2 == 0)
i += 3;
else
i += 6;
}
System.out.println("Product = " + pro);
}
}Output
public class KBoatSeries
{
public static void main(String args[]) {
long pro = 1;
int num = 3, t = 1;
while(num <= 30) {
pro *= num;
if(t % 2 == 0)
num += 3;
else
num += 6;
t++;
}
System.out.println("Product = " + pro);
}
}Output
public class KBoatSeries
{
public static void main(String args[]) {
long pro = 1;
int num = 3, t = 1;
do {
pro *= num;
if(t % 2 == 0)
num += 3;
else
num += 6;
t++;
} while(num <= 30);
System.out.println("Product = " + pro);
}
}Output
