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Merged
merged 4 commits into from
Oct 30, 2023
Merged

Enhance code density and readability #4914

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cd14b2b
Enhance code density and readability
Hardvan Oct 24, 2023
5179abb
Add wiki link
Hardvan Oct 24, 2023
b7a5d69
Merge branch 'master' into binary-exponentiation
Hardvan Oct 28, 2023
4b1c819
Merge branch 'master' into binary-exponentiation
vil02 Oct 30, 2023
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10 changes: 6 additions & 4 deletions src/main/java/com/thealgorithms/divideandconquer/BinaryExponentiation.java
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Expand Up @@ -2,6 +2,8 @@

// Java Program to Implement Binary Exponentiation (power in log n)

// Reference Link: https://en.wikipedia.org/wiki/Exponentiation_by_squaring

/*
* Binary Exponentiation is a method to calculate a to the power of b.
* It is used to calculate a^n in O(log n) time.
Expand All @@ -14,14 +16,14 @@ public class BinaryExponentiation {

// recursive function to calculate a to the power of b
public static long calculatePower(long x, long y) {
// Base Case
if (y == 0) {
return 1;
}
long val = calculatePower(x, y / 2);
if (y % 2 == 0) {
return val * val;
if (y % 2 == 1) { // odd power
return x * calculatePower(x, y - 1);
}
return val * val * x;
return calculatePower(x * x, y / 2); // even power
}

// iterative function to calculate a to the power of b
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