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+//=====================================================================================
+//Chapter 16 example 9
+clc;clear all;
+
+//variable declaration 
+f    = 2000;    //frequency in Hz
+D    = 0.2;     //duty cycle
+
+//calculations
+T    = 1/(f);    //time period in ms
+d   = D*T;           //pulse duration in ms
+
+//result
+mprintf("pulse duration = %3.2f ms",(d*10^3));
+