Codecademy C#

Question 1

Command to print text to a console

Answer 1

Console.WriteLine(“”)

Question 2

Command to read text a user types into the console

Answer 2

Console.ReadLine()

Question 3

Command to run interactive code

Answer 3

dotnet run

Question 4

One line comments

Answer 4

after //

Question 5

Multi-line comments

Answer 5

between /* and */

Question 6

Whole integer number data type

Answer 6

int

Question 7

A piece of text data type

Answer 7

string

Question 8

Data type which represents the logical idea of true or false

Answer 8

bool

Question 9

Decimal number data types

Answer 9

double

Question 10

Single characters data type

Answer 10

char

Question 11

Assign variable command

Answer 11

data type __________ = “__________”;

Question 12

Assign variable example

Answer 12

string countryName = “Netherlands”

Question 13

Good practice style for naming variables

Answer 13

camelCase

Question 14

camelCase example

Answer 14

string iAmAVariable

Question 15

Implicit conversion definition

Answer 15

Happens automatically if no data will be lost in the conversion

Question 16

Explicit conversion definition

Answer 16

Requires a cast operator to convert a data type into another one

Question 17

Explicit method for converting to string

Answer 17

Convert.ToString()

Question 18

Explicit method for converting to double

Answer 18

Convert.ToDouble()

Question 19

Character after decimal to show that it’s a decimal

Answer 19

m

Question 20

Character after decimal to show that it’s a decimal example

Answer 20

decimal variableName = 489872.76m

Question 21

Command to increment by one

Answer 21

++

Question 22

Command to decrease by one

Answer 22

• -

Question 23

Modulo definition

Answer 23

Returns a remainder

Question 24

Modulo operator

Answer 24

%

Question 25

Command too find the absolute value of a number

Answer 25

Math.Abs()

Question 26

Command to find the square root of a number

Answer 26

Math.Sqrt()

Question 27

Command to round a given double or decimal down to the nearest whole number

Answer 27

Math.Floor()

Question 28

Command to return the smaller of two numbers

Answer 28

Math.Min()

Question 29

Not a number abbreviation

Answer 29

NaN

Question 30

Command to raise an exponent

Answer 30

Math.Pow( , )

Question 31

Command to round a double or decimal up

Answer 31

Math.Ceiling()

Question 32

Command to find the larger of two numbers

Answer 32

Math.Max()

Question 33

Character to escape a character

Answer 33

\

Question 34

Command to print the following text on a new line

Answer 34

\n

Question 35

String concatenation symbol

Answer 35

+

Question 36

String interpolation definition

Answer 36

A method for inserting variable values in the middle of a string

Question 37

String interpolation command

Answer 37

$“{}”

Question 38

String interpolation example

Answer 38

$”Your favorite musician is {yourFaveMusician}.”

Question 39

Command to find how many characters exist in a string

Answer 39

.Length

Question 40

Command to find the position of a specific character or substring in a string

Answer 40

.IndexOf()

Question 41

Command to grab part of a string and return a new string

Answer 41

.Substring()

Question 42

Command to change the case of strings to uppercase

Answer 42

.ToUpper()

Question 43

Command to change the case of a string to lowercase

Answer 43

.ToLower()

Question 44

Equals operator

Answer 44

==

Question 45

Inequality operator

Answer 45

!=

Question 46

Less than operator

Question 47

Greater than operator

Answer 47

>

Question 48

Less than or equal to operator

Answer 48

<=

Question 49

Greater than or equal to operator

Answer 49

> =

Question 50

AND operator

Answer 50

&&

Question 51

OR operator

Answer 51

||

Question 52

NOT operator

Answer 52

!

Question 53

Clause to write a conditional

Answer 53

if

Question 54

Clause to be executed if the if condition is false

Answer 54

else

Question 55

Conditional statement to use to check for multiple conditions

Answer 55

else if

Question 56

Statement which allows for compact control structures by evaluating a single expression and executing code blocks based on a matched case

Answer 56

switch

Question 57

Specifies different potential values

Answer 57

case

Question 58

Case to run if none of the conditions are met

Answer 58

default

Question 59

Ternary operator

Answer 59

?

Question 60

Ternary operator example

Answer 60

string color = “blue”

string result = (color == “blue”) ? “blue” : “NOT blue”;

Question 61

PascalCase definition

Answer 61

First letter of each word in a compound word is capitalized

Question 62

PascalCase example

Answer 62

YourMethodName

Question 63

Operator for defining an optional parameter

Answer 63

=

Question 64

Defining an optional parameter example

Answer 64

static void YourMethodName(string punctuation = “.”)

Question 65

Named arguments command

Answer 65

YourMethodName(argumentName: argumentValue);

Question 66

Named arguments example

Answer 66

YourMethodName(d: 4);

Question 67

Int16 storage capacity

Answer 67

-32,768 to +32,767

Question 68

Int32 storage capacity

Answer 68

-2,147,483,648 to +2,147,483,647

Question 69

Int64 storage capacity

Answer 69

-9,223,372,036,854,775,808 to +9,223,372,036,854,775,807

Question 70

Method overload definition

Answer 70

Having multiple versions of the same method but with different parameters

Question 71

Method overload example

Answer 71

Math.Round(Double, Int32) vs Math.Round(Double)

Question 72

Return type to be used if a method returns nothing

Answer 72

void

Question 73

Return type to be used if a method returns nothing example

Answer 73

static void DecoratePlanet()

Question 74

Return type to be used if a method returns a string example

Answer 74

static string DecoratePlanet()