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+//Example number 2.6, Page number 33
+
+clc;clear;
+close;
+
+// Variable declaration
+r1=1.258*10**-10; // radius(m)
+r2=1.292*10**-10; // radius(m)
+
+// Calculation
+a_bcc=4*r1/sqrt(3);
+v=a_bcc**3;
+V1=v/2;
+a_fcc=2*sqrt(2)*r2;
+V2=a_fcc**3/4;
+V=(V1-V2)*100/V1; // percent volume change is",V,"%"
+
+// Result
+printf( "percent volume change is %.1f %%",V)