Add Set Kth Bit (#4990)

src/main/java/com/thealgorithms/bitmanipulation/SetKthBit.java

@@ -0,0 +1,22 @@
+package com.thealgorithms.bitmanipulation;
+
+/***
+ * Sets the kth bit of a given integer to 1
+ * e.g. setting 3rd bit in binary of 17 (binary 10001) gives 25 (binary 11001)
+ * @author inishantjain
+ */
+
+public class SetKthBit {
+    /**
+     * Sets the kth bit of a given integer.
+     *
+     * @param num The original integer.
+     * @param k   The position of the bit to set (0-based index).
+     * @return The integer with the kth bit set.
+     */
+    public static int setKthBit(int num, int k) {
+        int mask = 1 << k;
+        num = num | mask;
+        return num;
+    }
+}