created perfect_cube.py (TheAlgorithms#2076)

* created perfect_cube.py

To find whether a number is a perfect cube or not.

* Update perfect_cube.py

* Update perfect_cube.py

* Update perfect_cube.py

Author: vicky1999

maths/perfect_cube.py

@@ -0,0 +1,16 @@
+def perfect_cube(n: int) -> bool:
+    """
+    Check if a number is a perfect cube or not.
+
+    >>> perfect_cube(27)
+    True
+    >>> perfect_cube(4)
+    False
+    """
+    val = n ** (1 / 3)
+    return (val * val * val) == n
+
+
+if(__name__ == '__main__'):
+    print(perfect_cube(27))
+    print(perfect_cube(4))