Answer to Question #165173 in Algorithms for Kwame Hayford

Question

State whether each of the following is true or false. If false, explain why.

a. An algorithm is a procedure for solving a problem in terms of the actions to execute and the order in which these actions execute.

b. A set of statements contained within a pair of parentheses is called a block.

c. A selection statement specifies that an action is to be repeated while some condition remains true.

d. A nested control statement appears in the body of another control statement.

e. Java provides the arithmetic compound assignment operators +=, -=, *=, /= and %= for abbreviating assignment expressions.

f. The primitive types (boolean, char, byte, short, int, long, float and double) are portable across only Windows platforms.

g. Specifying the order in which statements (actions) execute in a program is called program control.

h. The unary cast operator (double) creates a temporary integer copy of its operand.

i. Instance variables of type boolean are given the value TRue by default.

j. Pseudocode helps a programmer think out a program before attempting to write it in a programming language.

 

Write four different Java statements that each add 1 to integer variable x.

Answer 1

a. true

b. false; a set of statements contained within a pair of braces ({and}) is called a block

c. false; a repetition statement specifies that an action is to be repeated while some con-

dition remains true

d. true

e. true

f. false; the primitive types (boolean, char, byte, short, int, long, float and double) are portable across all computer platforms that support Java

g. true

h. false; the unary cast operator (double) creates a temporary floating-point copy of

its operand

i. false; instance variables of type boolean are given the value false by default

j. true

$x=x+1;$

$x+=1;$

$++x;$

$x++;$