perfect square (#1534)

* perfect square

* perfect square

Author: realDuYuanChao

maths/perfect_square.py

@@ -0,0 +1,27 @@
+import math
+
+
+def perfect_square(num: int) -> bool:
+    """
+    Check if a number is perfect square number or not
+    :param num: the number to be checked
+    :return: True if number is square number, otherwise False
+
+    >>> perfect_square(9)
+    True
+    >>> perfect_square(16)
+    True
+    >>> perfect_square(1)
+    True
+    >>> perfect_square(0)
+    True
+    >>> perfect_square(10)
+    False
+    """
+    return math.sqrt(num) * math.sqrt(num) == num
+
+
+if __name__ == '__main__':
+    import doctest
+
+    doctest.testmod()