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Math.pow() is a function that is provided to us by Java. Here, it takes 2 parameters. When I pass in 2 and j, it does exponentiation (known as "power") as 2 to the j-th power. For example, Math.pow(3,5) = 3 * 3 * 3 * 3 * 3.

Also, Math.pow() returns a double instead of an int. We "cast" it to an integer by putting

(int)

in front of it. We cast our result since a is an integer type and we can only assign an int type to it.

class Solution{
public static void main(String []argh){
Scanner in = new Scanner(System.in);
int t=in.nextInt();
for(int i=0;i<t;i++){
int a = in.nextInt();
int b = in.nextInt();
int n = in.nextInt();
for (int j = 0; j < n; j++) {
int c = a + b * (int) Math.pow(2, j);
System.out.print(a + " ");
a = c;
}
System.out.println();
}
in.close();
}
}

## Java Loops II

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is shorthand for

Math.pow() is a function that is provided to us by Java. Here, it takes 2 parameters. When I pass in

2andj, it does exponentiation (known as "power") as 2 to the j-th power. For example, Math.pow(3,5) = 3 * 3 * 3 * 3 * 3.Also, Math.pow() returns a

doubleinstead of anint. We "cast" it to an integer by puttingin front of it. We cast our result since

ais an integer type and we can only assign aninttype to it.Hope this helps.

HackerRank solutions.

Thank you very much for explaining me.

what's wrong with this? can you please tell me

I think the values for "a" and "c" are incorrect inside the inner for loop.

where the value of t is used ?what is neccesary of it in this code....

t is number of test cases

Great explanation. Thank you so much.