CS2 Q2
The flow of this structure depends on the instructions given to the computer
Sequence structure
The Switch-selection structure is a _____-selection structure
multi/multiple
Used in situations where you need to evaluate multiple conditions
nested decision statement
The default in the switch control structure is executed when?
no case matches the value of the expression
This structure is also called a looping structure or loops
repetition structure
Decision structure is also called?
selection structure or conditionals
The IF selection structure is a ______-selection structure
single
True and false are not variable names nor string but are _______ _________ and in fact are ________ _____
special constants, reserved words
Nested IF Statement
statement placed inside another if statement
compound statements
statements with more than one line
Does not require the evaluation of a logical expression
switch case
With this selection structure, programs can have multiple options on which set of statements to execute.
switch case
It either ignores or selects a set of actions
IF selection structure (2)
assignment operator
=
Conditions take the form of (except for SWITCH Selection Structures)?
Boolean
Logical expressions may be in any form such as:
- Boolean variable or constant - A variable/value followed by a relational operator followed by another variable/value - Logical expression followed by a logical operator followed by a logical expression
Rules in Switch Case
1. The program can only choose one case per execution of the switch statement. 2. The value of the variable will determine the case selected. 3. Expression must evaluate to an integral type of value. 4. The data type and the case value must be the same. 5. Case value must also be an integral data type. It cannot contain another expression. 6. At the end of the statements inside the case is a break. 7. Each time the switch statement is executed: a. An expression is evaluated. b. Case values are evaluated, starting with the first value. c. The first case value that matches the expression will be executed. d. Statements execute until a break keyword is encountered. 8. If no case value matches the value of the expression, then the default case is chosen and executed.
In C++, which operator is used to check for equality in an IF statement?
==
relational operator
==
Decision structure/selection structure/conditionals
Directs the computer to make a decision and take the appropriate action based on that decision
Sequence Structure
Directs the computer to process the program instructions in the order listed in the source code
Repetition Structure
Directs the computer to repeat one or more instructions until some condition is met, at which time the computer should stop repeating the instructions
TRUE OR FALSE: If a decision statement is already inside another decision statement, you can no longer place another one inside it.
FALSE
TRUE OR FALSE: Switch statements allow boolean expressions
FALSE
TRUE OR FALSE: You cannot add IF statements to ELSE and ELSE IF statements
FALSE
True or False: In C++, the IF statement is used for iteration control flow.
FALSE
True or False: The ELSE has a condition
FALSE
True or False: The IF statement in C++ can only be used to compare two values and make a decision based on the result.
FALSE
TRUE OR FALSE: In the code snippet below, Statement 1 will be executed. int x = 4; if(x > 5) { if(x < 10) { //Statement 1 } }
FALSE, x=4 is not greater than 5 therefore statement 1 will not execute
It is used to specify the conditions in which a statement or group of statements should be executed or not.
IF selection structure
In the __-____ statement, when the condition is true, it will execute the statement or group of statements, while if the condition is false, the other statements or block of statements are executed.
IF-ELSE
Chooses between two courses of action and can either go to only one
IF/ELSE Selection Structure (2)
Integral type declare
Integer values
Which of the following statements is true about the selection control structure in C++?
It allows a program to execute different blocks of code based on the evaluation of a condition.
Which of the following best describes the role of the IF statement in C++ programming?
It is used to control the flow of a program based on a condition
Selection can be classified into
One-way (single) selection Two-way (double) selection Multi-selection or Compound Block
IF/ELSE Selection Structure
Performs an action if a condition is true and performs a different action if the condition is false
IF Selection Structure
Performs an action if a condition is true or skips the action and continues with the series of statements
SWITCH Selection Structure
Performs one of many different actions depending on the value of an integer expression
Which of the following represents a control structure in C++ that allows a program to execute a block of code repeatedly based on the evaluation of a condition?
Repetition
In C++, the basic control structures are the following
Repetition Selection Sequence
Which of the following control structures in C++ allows a program to execute different blocks of code based on the evaluation of a condition?
Selection
It is a control structure that chooses its flow of control based on two or more options.
Selection (Branching) control structure
Selects the action to perform from many different actions
Switch Selection Structure (2)
It is a type of selection structure that selects the action to perform from many different actions.
Switch-selection structure
TRUE OR FALSE: It is possible to place ELSE statements inside an IF block.
TRUE
TRUE OR FALSE: It is possible to place IF statements inside an ELSE block.
TRUE
TRUE OR FALSE: Nested IF statements can be referred as the inner IF and the original if statement as the outer IF.
TRUE
The IF statement in C++ can only be used to execute a block of code if a specified condition is true.
TRUE
True or False: A semicolon after the if condition and before statements will yield the program a syntax error
TRUE
True or False: The IF statement in C++ allows for the execution of different code blocks based on specified conditions.
TRUE
TRUE OR FALSE: In the code snippet below, Statement 1 will be executed. int x = 7; if(x > 5){ if(x < 10){ //Statement 1 } }
TRUE, 7 is greater than 5 and less than 10. Therefore, statement 1 will execute
In C++, what is the purpose of the IF statement in decision control flow?
To execute a block of code only if a specified condition is true.
Selection (Branching) Control Structure
When we want the execution of some statements in the program to be based on conditions
characters
automatically converted to an integer value by compiler
What are found at the end of statements in the switch control structure?
break; (break statement)
nested decision statement
decision statement placed inside another decision statement
The IF/ELSE Selection Structure is a ______-selection structure
double
The program goes to ____ if the condition of if results to true
else
fail-safe portion of ladder
else
0 (in Boolean values) is equivalent to?
false
if statement form
if (boolean_expression) statement;
In C++, the IF statement is used for decision control flow to execute a certain block of code based on a specified condition. Which of the following best represents the syntax for the IF statement in C++?
if (condition) {
IF statement real-life examples
if it is raining outside, bring an umbrella if the storm signal is #2, there is no classes if you are thirsty, drink something if your gas is empty, fill up
An IF-ELSE structure should start with an __ block followed by the ____ block
if, else
Members of an enumerated type
interpreted as integer by compiler
