Question

write Java statements that perform the following functions ?

21 If x is greater than or equal zero, then assign the square root of x to variable sqrtx and print out the result Otherwise, print out an error message about the argument of the square root function and set sqrtx to zero (2) 22 A variable fun is calculated by dividing variable numerator by variable denominator If the absolute value of denominator is less than 1, write "Divide by zero error Otherwise calculate and print out fun (3) 23 The cost per kilometre for a rented vehicle is 50c for the first 100 kilometres, 300 for the next 200 kilometres and 200 for all kilometres in excess of 300 kilometres Determine the total cost and the average cost per kilometre for a given number of kilometres (stored in variable distance) (3) 24 Write a method called average that accepts an array of floating point numbers and returns their average (3) 25 Wnte a switch statement that switches on an integer variable named val If val is 2 or 15, then output "Hello World ” For all other values, output "Goodbye World" (3)

Answer 1

import java.lang.Math;
class Greater
{
public static void sqrt(int x)
{
double sqrtx;
if(x>=0)
{
sqrtx= Math.sqrt(x);
System.out.println(sqrtx);
}
else
{
System.out.println("The argument passed to find the square root cannot be negative");
sqrtx=0;
}
  
}
public static void main(String []args)
{
sqrt(9);
}
}

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