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C Sharp Final Exam

memorize.ai (lvl 286)

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Mar 1, 2020

Cards (43)

Section 1

(43 cards)

field

Front

variable that belongs to the class and is static to that class not to any particular method (if you want to make it public to the application put public access identifier in front of it. )

Back

Conditional Expression

Front

-Appear inside parentheses -expression may be simple Boolean identifier -two operands are required when equality or relational symbols are used.

Back

local variable

Front

variable declared in a method only used within that method

Back

Two Way Selection Statement

Front

Either the true statement is executed or the false statement NOT BOTH. if (expression) { statement;} else { statement;}

Back

Making Decisions

Front

Central to both selection and iteration constructs. Enable deviation from sequential path in program.

Back

Matching up Else and If clauses

Front

Else goes with the closest previous IF that does not have its own ELSE

Back

SWITCH STATEMENTS EXAMPLE

Front

Switch ( weekDay) { case 1:WriteLine("monday"); break; case 2:WriteLine("tuesday"); break; default: WriteLine('not monday through friday'); break; }

Back

Do. While statements

Front

When you want to put the condition at the end of the statement instead of the beginning do { statement; } while (conditional expression)

Back

Equality Operators

Front

Conventional to place the variable in the first operand location; value or expression in the second location.

Back

TryParse () Method (string someStringValue, out int result)

Front

Parse method in convert class convert strings values sent as arguments to their equivalent numeric value. if ( int.tryParse(in Value,out v1) == false) WriteLine (" Did not input a valid integer-"+"0 stored in v1");

Back

Object Concept

Front

Solution is defined in terms of a collection of cooperating objects CLASSES serve as templates from which many objects can be created

Back

Ternary Operator aka Conditional Operator

Front

General Form/ expression1 ? expression2 : expression3; when expression1 evaluates to true, expression2 is executed when expression1 evaluates to false, expression3 is executed. grade = examScore >89?'a':'c';

Back

Equality, Relational, and Logical Tests

Front

> Greater than / (8 >5) / true < Less than / ( 1 < 2) / true >= Greater than or equal/ (100 >= 100) <= Less than or equal/ ( 100<= 100)

Back

One- Way Selection Statements

Front

if ( expression) { statement}; when expression evaluates to false,statement following expression is skipped

Back

Windows MessageBox Class

Front

message box- dialog box - invoke MessageBox.show() method - overloaded method 1st argument - string displayed in window 2nd - caption for window title bar 3rd - type of dialog button 4th- button type

Back

Private Member Data

Front

All code you write is placed in a class when you define a class, you declare instance variables or fields that represent state of an object

Back

One- Way If Statements

Front

if (examScore > 89) { grade = 'A'; WriteLine("congratulations- great job!"); } WriteLine( " I am displayed, whether the expression " +" evaluates true or false");

Back

Nested if .. else statement

Front

bool hourlyEmployee; double hours, bonus; int yearsEmployed; if ( hourlyEmployee) if (hours > 40) bonus = 500; else bonus = 100; else if (yearsEmployed > 10) bonus = 300; else bonus = 200;

Back

Constructor

Front

Special type of method used to create objects instantiate the class differ from other methods do not return a value use public access modifiers

Back

Loop

Front

Repetition or iteration structures while do ..while for for each statements

Back

Foreach statement

Front

Define a loop with a collection of data ( array)

Back

Mutators

Front

Setters normally includes one parameter can be overloaded

Back

Windows Application Using Loops

Front

Event driven model designed with GUI predefined class called message box = to show results

Back

Short Circuit Evaluation

Front

Short Circuiting logical operators - && and || -OR ( ||) expressions- if the first evaluates as true ,no need to evaluate the second operand - AND ( &&) expressions if the first false, no need to evaluate second operand

Back

State Controlled Loops

Front

Similar to sentinel-controlled loops (flag controlled loops) instead of using a dummy or extreme value, use flag variable.

Back

If.. Else Selection Statements

Front

Classified as one-way, two -way or nested. Alternate paths based on result of conditional expression.

Back

Switch Selection Statements general form: switch (expression)- Selector { case value1 <-must be same type as selector: statement; break; default:statement; break; }

Front

Multiple selection structure called a case statement works for tests of equality only cannot be a constant literal can write 90 but not variable for 90

Back

Abstraction

Front

Attributes ( data) Behaviors( processes on the data)

Back

Order of Operations

Front

Associativity : left associative : all binary operators except assignment operators right associative : assignment operators and the conditional operator -order changed through use of parentheses

Back

Boolean Flags

Front

Declare boolean variable - bool identifier - initialize to true or false Used as flags to signal when a condition exists or when a condition changes

Back

Accesor

Front

Getters Returns the current value Stander naming convention prefix with GET

Back

For Loop

Front

Pretest form of loop specialized form of while statement general form: for ( statement; conditional expression ; statement) statement;

Back

Boolean Data Type

Front

-Bool type holds value of true or false -when a bool variable is used in a conditional expression

Back

Method Signature static int Add(int value 1,int value2)

Front

includes a return data type, name of the method and within the parameters any you want to pass in.

Back

NESTED LOOPS

Front

Loop can be nested inside an outer loop -inside nested loop is totally completed before the outside loop is tested a second time.

Back

ORDER OF OPERATIONS

Front

Unary / + - ! ++ -- / multiplicative * / % additive + - relational < > ><= >= equality == ! = logical & or | conidtional && conditional || conditional ternary ?: assignment : = *= /= %= += -=

Back

Relational Test

Front

Unicode character set used for comparing characters declared as char - cannot compare strings using relational symbols -string comparison == /!=

Back

Counter-Controlled Loop -Loop control variable

Front

-variable simulating a counter - conditional expression designed so you can exit loop after certain number of iterations

Back

Sentinel Controlled Loop

Front

Indefinite loops often used for inputting data tells user what value to type to end loop

Back

Method

Front

Reusable custom methods static or instance. static are usable in main static method instance are usable in custom methods

Back

Nested If Else Statement

Front

Acceptable to write an if within an if when block is completed all remaining conditional expressions are skipped or bypassed. No restrictions on the depth of nesting

Back

While Statement while (conditional expression) statements (s);

Front

aka a loop condition returns a Boolean result no semi colon after condition expression

Back

Initialization, test and update for statements floating point variables can be used

Front

compound initialization no initialization no conditional expression compound update //null loop body ** //compound test( conditional expression)

Back