Skip to content

Detect overflow in Pow.pow #7752

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Prasad-Pitke wants to merge 1 commit into
base: master
Choose a base branch
from
+2 −1
Open

Detect overflow in Pow.pow #7752

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion src/main/java/com/thealgorithms/maths/Pow.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -22,14 +22,15 @@ private Pow() {
* @param b the exponent to which the base {@code a} is raised. Must be a non-negative integer.
* @return the result of {@code a}<sup>{@code b}</sup> as a {@code long}.
* @throws IllegalArgumentException if {@code b} is negative.
* @throws ArithmeticException if the result overflows a {@code long}.
*/
public static long pow(int a, int b) {
if (b < 0) {
throw new IllegalArgumentException("Exponent must be non-negative.");
}
long result = 1;
for (int i = 1; i <= b; i++) {
result *= a;
result = Math.multiplyExact(result, (long) a);
}
return result;
}
Expand Down
Loading