Adding addition

hw01/main.py

@@ -0,0 +1,20 @@
+def add(x,y):
+    return x+y
+
+
+def calc():
+    while(True):
+        operation = input("Enter operation from [+]: ")
+        if operation == "+":
+            break
+        print("Enter valid operation")
+
+    x = float(input("1. Enter number: "))
+    y = float(input("2. Enter number: "))
+
+    if operation == "+":
+        print(add(x,y))
+
+
+if __name__ == "__main__":
+    calc()