EGR 1400 Study Exam 1 STUDY GUIDE VERIFIED CORRECT QUESTIONS AND ANSWERS LATEST UPDATED VERSION (GRADED A+)

variable - Answer️A storage location in memory. Variable names represent the memory location. data type - Answer️Specifies the type of data a variable can hold. C# provides many data types known as primitive data types. They store fundamental types of data such as strings and integers. variable name - Answer️Identifies a variable. Always choose a meaningful name for variables. The first character must be a letter or an underscore. The name cannot contain spaces. Do not use C# keywords or reserved words. string - Answer️A combination of characters. The value of a string variable is assigned on the right of the = operators surrounded by a pair of double quotes. concatenation - Answer️The appending of one string to the end of another string. C# uses the + operator for concatenation. Concatenation can happen between a string and another data type. local variable - Answer️Belongs to the method in which it was declared. Only statements inside that method can access the variable. scope - Answer️Describes the part of a program in which a variable may be accessed. The lifetime of a variable is the time period during which the variable exists in memory while the program is executing. double - Answer️Real numbers including numbers with fractional parts. int - Answer️Whole numbers in the range of -2,147,483,648 to 2,147,483,647 decimal - Answer️Indicates a 128-bit data type. Compared to double types, it has more precision and a smaller range, which makes it more appropriate for financial and monetary calculations. Be sure to add the letter M (or m) to a decimal value. type casting - Answer️Explicitly converting among types. You can use the cast operator which is simply a pair of parentheses with the type keyword in it. % - Answer️Modulus: divides one number by another and gives the remainder. ToString - Answer️Can optionally format a number to appear in a specific way. exception - Answer️An unexpected error that happens while a program is running. If it is not handled by the program, the program will abruptly halt. exception handlers - Answer️Codes that respond to exceptions. try block - Answer️Where statements that could have an exception are placed. catch block - Answer️Where statements respond to the exception when it happens are placed. number constant - Answer️A name that represents a value that cannot be changed during the program's execution. field - Answer️A variable that is declared at the class level. It is declared inside the class, but not inside of any method. It is a special type of variable and its scope is the entire class. TabIndex - Answer️Contains a numeric value indicating the control's position in the tab order. tab order - Answer️The order in which controls receive the focus. focus - Answer️Means that a control receives the user's keyboard input. group box - Answer️a control that is a container with a thin border and an optional title that can hold other controls. logic error - Answer️A mistake that does not prevent an application from running, but causes the application to produce incorrect results. breakpoint - Answer️A line that is selected in source code. break mode - Answer️The application pauses and enters breakmode when it is running and reaches a breakpoint. autos window - Answer️Displays a list of the variables appearing in the current statement, the three statements before, and the three statements after the current statement. The current value and the data type of each variable are also displayed. locals window - Answer️Displays a list of all the variables in the current procedure. The current value and the data type of each variable are also displayed. watch window - Answer️Allows you to add the names of variables you want to watch. This window displays only the variables you have added. single-step - Answer️The application's statements execute one at a time, under your control. This process allows you to identify the lines or lines of code causing the error. control structure - Answer️A logical design that controls the order in which statements execute. sequence structure - Answer️A set of statements that execute in the order that they appear. decision structure - Answer️Execute statements only under certain circumstances. if-else - Answer️Will execute one block of statement if its Boolean expression is true or another block if its Boolean expression is false. AND - Answer️&& OR - Answer️|| NOT - Answer️! AND operator - Answer️Both subexpression must be true for the compound expression to be true. OR operator - Answer️One or both subexpression must be true for the compound expression to be true. NOT operator - Answer️It negates (reverses) the value to its opposite one. - Answer️Less than - Answer️Greater than = - Answer️Greater than or equal to = - Answer️Less than or equal to == - Answer️equal to != - Answer️not equal to flag - Answer️A variable that signals when some condition exists in the program String.Compare - Answer️Compares two strings TryParse - Answer️Can prevent exceptions caused by users entering invalid data, but it does not check the integrity of the data. out - Answer️Required in TryParse command because it specifies that the targetVariable is an output variable input validation - Answer️The process of inspecting data that has been entered into a program to make sure it is valid before it is used. radio buttons - Answer️Allows users to select one choice from several possible choices. (Clicking on a radio button, the program automatically deselects any others. This is known as mutually exclusive selection.) check boxes - Answer️Allows users to select multiple options switch - Answer️Lets the value of a variable or an expression determine which path of execution the program will take. testExpression - Answer️A variable or an expression that given an integer, string, or bool value. Yet, it cannot be a floating-point or decimal value. list box - Answer️Displays a list of items and allow the user to select an item from the list. SelectedItem - Answer️Gets or sets the currently selected item in the ListBox. When the user selects an item, the item is stored in this property. SelectedIndex - Answer️Gets or sets the zero-based index of the currently selected item in a ListBox. Items.Add - Answer️Allows you to add an item to the ListBox control. Items.Clear - Answer️Can erase all the items in the Items property. count - Answer️Reports the number of items stored in the ListBox. while loop - Answer️Causes a statement or set of statements to repeat as long as a Boolean expression is true. It tests its condition before performing an iteration. It is necessary to declare a counter variable with initial value. iteration - Answer️Each time the loop executes its statement or statements. while clause - Answer️The first line of a while loop infinite loop - Answer️A loop that will repeat until the program is interrupted. ++ - Answer️Increment -- - Answer️Decrement Postfix mode - Answer️To place the ++ or -- operators after their operands. Prefix mode - Answer️To place the ++ or -- operators before their operands. for loop - Answer️Designed for situations requiring a counter variable to control the number of times that a loop iterates. initialization - Answer️A one-time expression that defines the initial value of the counter. test - Answer️A Boolean expression to be tested. If true, the loop iterates. update - Answer️Increase or decrease the value of the counter. do-while loop - Answer️A posttest loop, which means it performs an iteration before testing its Boolean expression.