Create README.md and completed task1

ch_nandu/README.md

@@ -0,0 +1,30 @@
+#a simple python program to perform basic tasks like addition,subtraction,multiplication,division
+print('please select any of the number for performing arithmetic operations')
+print("1.Addition")
+print('2.Subtraction')
+print('3.Multiplication')
+print('4.Division')
+print('5.exit')
+a=int(input('Enter any of the number for performing arithmetic operations'))
+def ari(a,var1,var2):
+    a,var1,var2=a,var1,var2
+    if(a==1):
+        print(var1+var2)
+    if(a==2):
+        print(var1-var2)
+    if(a==3):
+        print(var1*var2)
+    if(a==4):
+        print(var1/var2)
+    return
+
+#Enter Two numbers
+if((a>0) and (a<5)):
+    var1 = int(input('Enter First number: '))
+    var2 = int(input('Enter Second number: '))
+    ari(a,var1,var2)
+elif(a==5):
+    exit()
+else:
+    print('Invalid Option')
+    print('please select 1/2/3/4/5 only')