C# – Page 4 – Iampsp Blog

The else if Statement

Use the else if statement to specify a new condition if the first condition is False.

Syntax

if (condition1)
{
// block of code to be executed if condition1 is True
} 
else if (condition2) 
{
// block of code to be executed if the condition1 is false and condition2 is True
} 
else
{
// block of code to be executed if the condition1 is false and condition2 is False
}

Example

int time = 22;
if (time < 10) 
{
  Console.WriteLine("Good morning.");
} 
else if (time < 20) 
{
  Console.WriteLine("Good day.");
} 
else 
{
  Console.WriteLine("Good evening.");
}
// Outputs "Good evening."

Continue reading C# The else if Statement

The else Statement

Use the else statement to specify a block of code to be executed if the condition is False.

Syntax

if (condition)
{
// block of code to be executed if the condition is True
} 
else 
{
// block of code to be executed if the condition is False
}

Example

int time = 20;
if (time < 18) 
{
  Console.WriteLine("Good day.");
} 
else 
{
  Console.WriteLine("Good evening.");
}
// Outputs "Good evening."

Continue reading C# The else Statement

C# Conditions and If Statements

C# supports the usual logical conditions from mathematics:

Less than: a < b
Less than or equal to: a <= b
Greater than: a > b
Greater than or equal to: a >= b
Equal to a == b
Not Equal to: a != b

You can use these conditions to perform different actions for different decisions.

C# has the following conditional statements:

Use if to specify a block of code to be executed, if a specified condition is true
Use else to specify a block of code to be executed, if the same condition is false
Use else if to specify a new condition to test, if the first condition is false
Use switch to specify many alternative blocks of code to be executed

Continue reading C# If … Else

C# Booleans

Very often, in programming, you will need a data type that can only have one of two values, like:

YES / NO
ON / OFF
TRUE / FALSE

For this, C# has a bool data type, which can take the values true or false.

Continue reading C# Booleans

Strings – Special Characters

Because strings must be written within quotes, C# will misunderstand this string, and generate an error:

string txt = "We are the so-called "Vikings" from the north.";

The solution to avoid this problem, is to use the backslash escape character.

The backslash (\) escape character turns special characters into string characters: Continue reading C# Special Characters

Access Strings

You can access the characters in a string by referring to its index number inside square brackets [].

This example prints the first character in myString:

Example

string myString = "Hello";
Console.WriteLine(myString[0]);  // Outputs "H"

Note: String indexes start with 0: [0] is the first character. [1] is the second character, etc.

Continue reading C# Access Strings

String Interpolation

Another option of string concatenation, is string interpolation, which substitutes values of variables into placeholders in a string. Note that you do not have to worry about spaces, like with concatenation : Continue reading C# String Interpolation

C# String Concatenation

String Concatenation

The + operator can be used between strings to combine them. This is called concatenation:

Example

string firstName = "John ";
string lastName = "Doe";
string name = firstName + lastName;
Console.WriteLine(name);

Note that we have added a space after “John” to create a space between firstName and lastName on print.

Continue reading C# String Concatenation

C# Strings

Strings are used for storing text.

A string variable contains a collection of characters surrounded by double quotes:

Example

Create a variable of type string and assign it a value:

string greeting = "Hello";

Continue reading C# Strings

C# Math

The C# Math class has many methods that allows you to perform mathematical tasks on numbers

Math.Max(x,y)

The Math.Max(x,y) method can be used to find the highest value of x and y:

Example

Math.Max(5, 10);

Continue reading C# Math