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+//Example number 8.5, Page number 171
+
+clc;clear;
+close;
+
+//Variable declaration
+Is=1.96*10**6; //saturation magnetisation(amp/m)
+a=3*10**-10; //cube edge(m)
+mewB=9.27*10**-24; //bohr magneton(amp/m**2)
+n=2; //number of atoms
+//Calculation
+N=n/(a**3);
+mew_bar=Is/(N*mewB); //average number of bohr magnetons(bohr magneton/atom)
+//Result
+printf("average number of bohr magnetons is %.3f bohr magneton/atom",mew_bar)