1- Which of the following code displays the area of a circle if the radius is positive? if (radius >= 0) System.out.println(radius * radius * 3.14159); if (radius <= 0) System.out.println(radius * radius * 3.14159); if (radius > 0) System.out.println(radius * radius * 3.14159); if (radius != 0) System.out.println(radius * radius * 3.14159); 2- Analyze the following code: // Enter an integer Scanner input = new Scanner(System.in); int number = input.nextInt(); if (number <= 0) System.out.println(number); System.out.println(number); must be placed inside braces { and }. The if statement is wrong, because it does not have the else clause. The user cannot enter a negative number. If t he user enter a number grater than zero or equal to zero, then the number is displayed. 3- Suppose x = 0, y = -1, and z = 1. What is the printout of the following statement? if (x > 0) if (y > 0) System.out.println("x > 0 and y > 0"); else if (z > 0) System.out.println("x < 0 and z > 0"); x < 0 and z < 0; no printout. x < 0 and z > 0; x > 0 and y > 0;
1- Which of the following code displays the area of a circle if the radius is positive?
if (radius >= 0) System.out.println(radius * radius * 3.14159);
if (radius <= 0) System.out.println(radius * radius * 3.14159);
if (radius > 0) System.out.println(radius * radius * 3.14159);
if (radius != 0) System.out.println(radius * radius * 3.14159);
2- Analyze the following code:
// Enter an integer
Scanner input = new Scanner(System.in);
int number = input.nextInt();
if (number <= 0)
System.out.println(number);
System.out.println(number); must be placed inside braces { and }.
The if statement is wrong, because it does not have the else clause.
The user cannot enter a negative number.
If t he user enter a number grater than zero or equal to zero, then the number is displayed.
3- Suppose x = 0, y = -1, and z = 1. What is the printout of the following statement?
if (x > 0)
if (y > 0)
System.out.println("x > 0 and y > 0");
else if (z > 0)
System.out.println("x < 0 and z > 0");
x < 0 and z < 0;
no printout.
x < 0 and z > 0;
x > 0 and y > 0;
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