└── java


/java:
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 1 | import java.util.*;
 2 | 
 3 | class ComputeElectricityBill {
 4 | 
 5 | 	public static int calculateBill(int units)
 6 | 	{
 7 | 
 8 | 		if (units <= 100) {
 9 | 			return units * 10;
10 | 		}
11 | 		else if (units <= 200) {
12 | 			return (100 * 10)
13 | 				+ (units - 100)
14 | 					* 15;
15 | 		}
16 | 		else if (units <= 300) {
17 | 			return (100 * 10)
18 | 				+ (100 * 15)
19 | 				+ (units - 200)
20 | 					* 20;
21 | 		}
22 | 		else if (units > 300) {
23 | 			return (100 * 10)
24 | 				+ (100 * 15)
25 | 				+ (100 * 20)
26 | 				+ (units - 300)
27 | 					* 25;
28 | 		}
29 | 		return 0;
30 | 	}
31 | 
32 | 	public static void main(String args[])
33 | 	{
34 | 		int units = 250;
35 | 
36 | 		System.out.println(
37 | 			calculateBill(units));
38 | 	}
39 | }
40 | 


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