C# For Coding

Question 1

Console.WriteLine()

Answer 1

A command that PRINTS text to a console. Whatever is in the parentheses will be written in the game. (“Hello World”);

Question 2

Question 3

Question 4

What is a string?

Answer 4

A piece of text in C#.

Question 5

Console.ReadLine()

Answer 5

CAPTURES user input to the console.

Question 6

Comments

Answer 6

Lines of code that are ignored by your computer. They are intended to be read by developers. // and /* */ for longer explanations.

Question 7

~

Answer 7

Tilde.

Til-duh

Question 8

Answer 8

ASCII art

Question 9

Data Types

Answer 9

Languages like C-sharp tell a computer about the type of data in its program using data types.

Question 10

Statically Typed

Answer 10

C-sharp will check that we use the correct types before the program even runs. It helps write scalable code with fewer bugs.

Question 11

Int

Answer 11

Whole integer number

Question 12

Bool

Answer 12

Or Boolean. Represents the logical idea of true or false.

Question 13

Question 14

Question 15

Variable

Answer 15

Basically like a box in our computer memory where we can store values used in our code.

Question 16

Question 17

Answer 17

Question 18

var

Answer 18

Question 19

Error codes in C#

Answer 19

Question 20

What do variables consist of?

Answer 20

Underscores, letters and digits.

Question 21

What is a reserved keyword?

Answer 21

Words that the language already uses. If you name a variable “string” you risk creating errors in your code.

Question 22

Data type conversions:

Answer 22

Question 23

Converting Data Types:

Answer 23

Question 24

Explicit type casting, converting.

Answer 24

Question 25

Which would throw an error?

Answer 25

Question 26

Conversions

Answer 26

Question 27

Double

Answer 27

Uses double the memory (8bytes) and offers about double the precision(around 15 decimal digits) compared to float. (64 bits of memory)

Question 28

Float

Answer 28

Uses 4 bytes and has about 7 decimal digits of precision. (32bits memory)

Question 29

Double and Decimal: How to enter them in code.

Answer 29

Question 30

Arithmetic Operators

Answer 30

Addition, subtraction, multiplication, division.

Question 31

Using different data types:

Answer 31

Question 32

Truncated

Answer 32

Shortened in duration or extent. Decimals are sometimes truncated if they go on forever.

Question 33

Order of Operations:

Answer 33

Question 34

Operator Shortcuts:

Answer 34

Question 35

Decrement shortcut

Answer 35

-=3 instead

Question 36

Multiplication & Division Shortcuts:

Answer 36

*=3 will multiply the variables value by three and reassign the result to the variable. /=3 will do the same as above except divide it.

Question 37

Compound assignment operators:

Answer 37

+= -= *= /=

Question 38

Modulo

Answer 38

Question 39

Modulo example

Answer 39

Question 40

Modulo can check to see if answer is odd, or even.

Answer 40

Question 41

Methods:

Answer 41

Question 43

Absolute Value

Answer 43

Question 44

Method Example

Answer 44

Question 45

Public class:

Answer 45

Can be accessed from anywhere by name.

Question 46

Void class

Answer 46

Doesn’t return anything after it’s done.

Question 47

Static

Answer 47

Means it doesn’t move. It stays there forever until the process terminates. There can be only one static instance of something and that that’s why you access it without an instance of class, but rather buy the type name directly.

Question 49

General info Public, Void, Static.

Answer 49

Question 50

String Interpolation in C#

Answer 50

Question 51

Operator Shortcuts

Answer 51

Question 52

Built in Math Methods

Answer 52

Question 54

Name the bracket: () <> [] {}

Answer 54

Round bracket or parentheses Angled brackets Square brackets Curly brackets or braces.

Question 55

Strings

Answer 55

Question 56

Escape Character Sequences

Answer 56

Question 57

Escape Character Sequence example:

Answer 57

Question 58

Prepend

Answer 58

Add something at the beginning of something else.

Question 59

Strings (Length)

Answer 59

Question 60

Strings (IndexOf)

Answer 60

Question 61

Substring

Answer 61

Question 62

Substring I don’t understand where ‘decade’ comes from.

Question 64

Bracket Notation

Answer 64

Question 65

ToUpper ToLower

Answer 65

Question 66

Strings Cheatsheet

Answer 66

Question 67

Continued

Answer 67

Question 68

Continued

Answer 68

Question 69

Continued

Answer 69

Question 70

Continued

Answer 70

Question 71

Equality and Inequality Operators

Answer 71

Question 72

Comparison Operators

Answer 72

Question 73

Logical Operators

Answer 73

Question 74

Truth Table

Answer 74

Question 75

If statements

Answer 75

Question 76

If-Else statements

Answer 76

Question 77

Else If

Answer 77

Question 78

Switch Statements

Answer 78

Question 79

Switch statement continued

Answer 79

Question 80

Ternary Operators

Answer 80

Question 81

Difference between Console.Write() and Console.WriteLine()?

Answer 81

Console.Write() Allows user input to be on the same line where the user request is made. Console.WriteLine() Would put user input on the line below.

Question 82

If using double quotes in a string

Answer 82

Write a \ to separate the two quotes in the sentence. Example: Console.WriteLine("A voice behind the door speaks. It says, \"Answer this riddle: ");

Question 83

How to make quotations print in the console:

Answer 83

Console.WriteLine("\"Poor people have it. Rich people need it. If you eat it, you die. What is it?\"");