//water and its treatment//
//example 2.18.8//
clc
Hardness_Cl=2.42//in terms of °Clarke//
Hardness_Fr=3.6//in terms of °French//
Cl=Hardness_Cl/0.07//0.07°Clarke =1 ppm//
Fr=Hardness_Fr/0.1//0.1°French =1 ppm//
printf("2.42°Clarke %.2f mg/l or ppm",Cl);
printf("\n 3.6 °French %.0f mg/l or ppm",Fr);