diff --git a/SimpleCalc b/SimpleCalc
new file mode 100644
index 0000000..8aed082
--- /dev/null
+++ b/SimpleCalc
@@ -0,0 +1,48 @@
+# Program make a simple calculator
+
+# This function adds two numbers
+def add(x, y):
+    return x + y
+
+# This function subtracts two numbers
+def subtract(x, y):
+    return x - y
+
+# This function multiplies two numbers
+def multiply(x, y):
+    return x * y
+
+# This function divides two numbers
+def divide(x, y):
+    return x / y
+
+
+print("Select operation.")
+print("1.Add")
+print("2.Subtract")
+print("3.Multiply")
+print("4.Divide")
+
+while True:
+    # Take input from the user
+    choice = input("Enter choice(1/2/3/4): ")
+
+    # Check if choice is one of the four options
+    if choice in ('1', '2', '3', '4'):
+        num1 = float(input("Enter first number: "))
+        num2 = float(input("Enter second number: "))
+
+        if choice == '1':
+            print(num1, "+", num2, "=", add(num1, num2))
+
+        elif choice == '2':
+            print(num1, "-", num2, "=", subtract(num1, num2))
+
+        elif choice == '3':
+            print(num1, "*", num2, "=", multiply(num1, num2))
+
+        elif choice == '4':
+            print(num1, "/", num2, "=", divide(num1, num2))
+        break
+    else:
+        print("Invalid Input")
diff --git a/SimpleCalcs b/SimpleCalcs
new file mode 100644
index 0000000..8aed082
--- /dev/null
+++ b/SimpleCalcs
@@ -0,0 +1,48 @@
+# Program make a simple calculator
+
+# This function adds two numbers
+def add(x, y):
+    return x + y
+
+# This function subtracts two numbers
+def subtract(x, y):
+    return x - y
+
+# This function multiplies two numbers
+def multiply(x, y):
+    return x * y
+
+# This function divides two numbers
+def divide(x, y):
+    return x / y
+
+
+print("Select operation.")
+print("1.Add")
+print("2.Subtract")
+print("3.Multiply")
+print("4.Divide")
+
+while True:
+    # Take input from the user
+    choice = input("Enter choice(1/2/3/4): ")
+
+    # Check if choice is one of the four options
+    if choice in ('1', '2', '3', '4'):
+        num1 = float(input("Enter first number: "))
+        num2 = float(input("Enter second number: "))
+
+        if choice == '1':
+            print(num1, "+", num2, "=", add(num1, num2))
+
+        elif choice == '2':
+            print(num1, "-", num2, "=", subtract(num1, num2))
+
+        elif choice == '3':
+            print(num1, "*", num2, "=", multiply(num1, num2))
+
+        elif choice == '4':
+            print(num1, "/", num2, "=", divide(num1, num2))
+        break
+    else:
+        print("Invalid Input")
diff --git a/SimpleCalcz b/SimpleCalcz
new file mode 100644
index 0000000..8aed082
--- /dev/null
+++ b/SimpleCalcz
@@ -0,0 +1,48 @@
+# Program make a simple calculator
+
+# This function adds two numbers
+def add(x, y):
+    return x + y
+
+# This function subtracts two numbers
+def subtract(x, y):
+    return x - y
+
+# This function multiplies two numbers
+def multiply(x, y):
+    return x * y
+
+# This function divides two numbers
+def divide(x, y):
+    return x / y
+
+
+print("Select operation.")
+print("1.Add")
+print("2.Subtract")
+print("3.Multiply")
+print("4.Divide")
+
+while True:
+    # Take input from the user
+    choice = input("Enter choice(1/2/3/4): ")
+
+    # Check if choice is one of the four options
+    if choice in ('1', '2', '3', '4'):
+        num1 = float(input("Enter first number: "))
+        num2 = float(input("Enter second number: "))
+
+        if choice == '1':
+            print(num1, "+", num2, "=", add(num1, num2))
+
+        elif choice == '2':
+            print(num1, "-", num2, "=", subtract(num1, num2))
+
+        elif choice == '3':
+            print(num1, "*", num2, "=", multiply(num1, num2))
+
+        elif choice == '4':
+            print(num1, "/", num2, "=", divide(num1, num2))
+        break
+    else:
+        print("Invalid Input")
diff --git a/Swap Two Variables b/Swap Two Variables
new file mode 100644
index 0000000..22a78b5
--- /dev/null
+++ b/Swap Two Variables	
@@ -0,0 +1,16 @@
+# Python program to swap two variables
+
+x = 5
+y = 10
+
+# To take inputs from the user
+#x = input('Enter value of x: ')
+#y = input('Enter value of y: ')
+
+# create a temporary variable and swap the values
+temp = x
+x = y
+y = temp
+
+print('The value of x after swapping: {}'.format(x))
+print('The value of y after swapping: {}'.format(y))
diff --git a/quadratic equation b/quadratic equation
new file mode 100644
index 0000000..9304927
--- /dev/null
+++ b/quadratic equation	
@@ -0,0 +1,17 @@
+# Solve the quadratic equation ax**2 + bx + c = 0
+
+# import complex math module
+import cmath
+
+a = 1
+b = 5
+c = 6
+
+# calculate the discriminant
+d = (b**2) - (4*a*c)
+
+# find two solutions
+sol1 = (-b-cmath.sqrt(d))/(2*a)
+sol2 = (-b+cmath.sqrt(d))/(2*a)
+
+print('The solution are {0} and {1}'.format(sol1,sol2))