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+clc
+// Example 5.1.py
+// Consider the subsonic-supersonic flow through a convergent-divergent nozzle. The
+// reservoir pressure and temperature are 10 atm and 300 K, repectively. There are 
+// two locations in the nozzle where A/Astar = 6, one in the convergent section and
+// the other in the divergent section. At each location calculate M, p, T, u.
+
+// Variable declaration
+po = 10.0         // reservoir pressure (in atm)
+To = 300.0        // reservoir temperature (in K)
+A_by_Astar = 6.0  // area ratio
+gamma1 = 1.4       // ratio of specific heat
+R = 287.0         // gas constant (in J/ Kg K)
+
+// Calculations
+
+// from table A1 for subsonic flow with A/Astar = 6.0
+Msub = 0.097              // mach number in converging section
+po_by_p = 1.006           // po/p in converging section
+To_by_T = 1.002           // To/T in converging section
+
+psub = 1 / po_by_p * po       // pressure (in atm) in converging section
+Tsub = 1 / To_by_T * To       // temperature (in K) in converging section
+asub = (gamma1*R*Tsub** 0.5) // speed of sound (in m/s) in converging section
+usub = Msub*asub              // velocity (in m/s) in converging section
+
+// from table A1 for supersonic flow with A/Astar = 6.0
+Msup = 3.368              // mach number in diverging section
+po_by_p = 63.13           // po/p in diverging section
+To_by_T = 3.269           // To/T in diverging section
+
+psup = 1 / po_by_p * po       // pressure (in atm) in diverging section
+Tsup = 1 / To_by_T * To       // temperature (in K) in diverging section
+asup = (gamma1*R*Tsup** 0.5) // speed of sound (in m/s) in diverging section
+usup = Msup*asup              // velocity (in m/s) in diverging section
+
+
+// Results
+printf("\n Converging section")
+printf("\n M = %.3f", Msub)
+
+printf("\n p = %.2f atm", psub)
+
+printf("\n T = %.1f K", Tsub)
+
+printf("\n u = %.2f m/s", usub)
+
+
+printf("\n Divering section")
+printf("\n M = %.3f", Msup)
+
+printf("\n p = %.4f atm", psup)
+
+printf("\n T = %.2f K", Tsup)
+
+printf("\n u = %.2f m/s", usup)
+