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+//Example number 1.5, Page number 11
+clc;clear;
+close;
+
+//Variable declaration
+rCs=0.165*10**-9;    //radius(m)
+rCl=0.181*10**-9;    //radius(m)
+MCs=133;    //atomic weight
+MCl=35.5;   //atomic weight
+N=6.02*10**26;           //Avagadro Number
+
+//Calculation
+a=2*(rCl+rCs)/sqrt(3);     //lattice constant(m)
+M=(MCs+MCl)/N;       //mass of 1 molecule(kg)
+V=a**3;    //volume of unit cell(m**3)
+rho=M/V;    //density of CsCl(kg/m**3)
+
+//Result
+printf( "density of CsCl is %.3e kg/m**3",rho)
+//answer in the book varies due to rounding off errors