Update comments and add cylinder

cube.py

@@ -1,6 +1,6 @@
 from math import *
 
-## Exp W. Modes of long cyclinder (1D) ##
+## Exp W. Modes of long Cube ##
 u = 343 #speed of sound
 a = 0.2 #length width and height of cube
 b = 0.2

cylinder.py

@@ -0,0 +1,26 @@
+from math import *
+
+## Exp W. Modes of short cylinder ##
+u = 343 #speed of sound
+l = 0.05
+rho = 0.1
+alpha = [[0, 1.84, 3.05, 4.20],
+         [3.83, 5.33, 6.71, 8.02],
+         [7.01, 8.54, 9.97, 11.35]]
+fqn = [] #frequencies and respective quantum numbers
+f = [] # frequencies
+
+for n in range (0,4):
+    for m in range (0,4):
+        for j in range (1,4):
+            qn = [n,m,j]
+            frequency = u*sqrt((n**2/(4*l**2))+(((alpha[j-1][m])**2)/4*pi**2*rho**2))
+            if frequency in f: # check for duplicatesq
+                continue
+            else:
+                f.append(frequency)
+                fqn.append([frequency,f'n={n}, m={m}, j={j}'])
+
+for i in range(len(fqn)):
+    print(sorted(fqn)[i])
+