Conditionals (with solutions)

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1 Conditionals (with solutions) For exercises 1 to 27, indicate the output that will be produced. Assume the following declarations: final int MAX = 25, LIMIT = 100; int num1 = 12, num2 = 25, num3 = 87; 1. if (num1 < MAX) apple 2. if (num2 <= MAX) apple orange 3. if (MAX > num3) orange 4. if (num3 >= LIMIT) orange pear poor indentation 5. if (num2 == MAX) apple orange pear 6. if (num3-num2 > 2*MAX) apple 7. if (LIMIT+num3 <= 150) pear

2 8. if (2*num1!= num2) apple 9. if (LIMIT%num1 + 4 == num1 + (MAX-num2)) pear banana System.out.println ("banana"); 10. if (num1 < MAX) apple if (LIMIT >= num2) orange 11. if (LIMIT <= LIMIT) orange if (num3 == num1) 12. if (num2 > 18) orange if (num1 < 0) pear 13. if (LIMIT >= 4*num2) apple if (MAX == 25)

3 14. if (num2 < num1) pear if (num3 < LIMIT) poor indentation 15. if (num3 == 87) pear if (num2!= MAX) 16. if (num1+num2 > num3) orange if (num2*limit!= 3298) 17. if (LIMIT%MAX == 3) orange if (num2 == MAX) 18. if (num3 >= MAX) apple orange if (MAX/num2 == 1) banana kiwi coconut if (LIMIT-num3 > num1+2) System.out.println ("banana"); System.out.println ("kiwi"); if (num2*2 == MAX*2) System.out.println ("grapefruit");

4 System.out.println ("lime"); System.out.println ("coconut"); 19. if (num2 > num1 && LIMIT!= 100) orange 20. if (num3 == num2 && MAX > 50) orange 21. if (num1 > 7 && LIMIT <= 100) apple orange 22. if (num3 < 40 num3 > 50) apple orange 23. if (MAX == LIMIT num1*2 == num2) orange 24. if (num2%2!= 0 num3 > LIMIT) apple orange 25. if (MAX == 25 && num2!= MAX num1 < num3) apple orange 26. if (num3 == 87 num2 > num1 && MAX > LIMIT) apple orange 27. if ((num3 == 87 num2 > num1) && MAX > LIMIT)orange

5 For exercises 28 to 41, write code segments that will perform the specified action. Assume that all variables have already been declared and given values. 28. Print "Hurrah!" if sum is evenly divisible by count. if (sum%count == 0) System.out.println ("Hurrah!"); 29. Increment the integer variable total if total is zero and decrement total otherwise. if (total == 0) total++; total--; 30. Print "num is zero", "num is negative", or "num is positive" as appropriate based on the current value of num. if (num == 0) System.out.println ("num is zero"); if (num < 0) System.out.println ("num is negative"); System.out.println ("num is positive"); 31. Print "num is zero", "num is even", or "num is odd" as appropriate based on the current value of num. if (num == 0) System.out.println ("num is zero"); if (num%2 == 0) System.out.println ("num is even"); System.out.println ("num is odd"); 32. Print "Victory" only if result is greater than or equal to 500 and penalty is equal to zero (use nested ifs). if (result >= 500) if (penalty == 0) System.out.println ("Victory");

6 33. Print "Victory" only if result is greater than or equal to 500 and penalty is equal to zero (use logical operators). if (result >= 500 && penalty == 0) System.out.println ("Victory"); 34. Assign the smallest of two integer values num1 and num2 to the variable smallest. (use an if- statement) if (num1 < num2) smallest = num1; smallest = num2; 35. Assign the smallest of two integer values num1 and num2 to the variable smallest. (use the conditional operator) smallest = (num1 < num2)? num1 : num2; 36. Assign the smallest of three integer values num1, num2, and num3 to the variable smallest. (do not use logical operators) if (num1 < num2) if (num1 < num3) smallest = num1; smallest = num3; if (num2 < num3) smallest = num2; smallest = num3; 37. Assign the smallest of three integer values num1, num2, and num3 to the variable smallest. (use logical operators) if (num1 < num2 && num1 < num3) smallest = num1; if (num2 < num3) smallest = num2; smallest = num3;

7 38. Print "This is a vowel." if the character stored in the variable letter is a lowercase vowel. if (letter == 'a' letter == 'e' letter == 'i' letter == 'o' letter == 'u') System.out.println ("This is a vowel."); 39. Of the two characters stored in the variables ch1 and ch2, print the one which comes later in the Unicode character set. if (ch1 < ch2) System.out.println (ch1); System.out.println (ch2); 40. Print "Uppercase", "Lowercase", or "Not a letter" depending on whether the character stored in ch is an uppercase alphabetic character, a lowercase alphabetic character, or not an alphabetic character at all. if (ch >= 'A' && ch <= 'Z') System.out.println ("Uppercase"); if (ch >= 'a' && ch <= 'z') System.out.println ("Lowercase"); System.out.println ("Not a letter"); 41. Print "Equal" if two floating point values stored in val1 and val2 are exactly equal, "Essentially Equal" if they are within of each other, or "Not Equal" otherwise. if (val1 == val2) System.out.println ("Equal"); if (Math.abs(val1-val2) < ) System.out.println ("Essentially Equal"); System.out.println ("Not Equal");

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