9, C # inside the relationship expression, logical expression

In the programming of C # language, relational expressions and logical expressions are often used, or mixed use of both.

1. relational expressions are made up of relational operators. For example:>,<,>=,<=,= = ,!=. An expression that uses these operators is called a relational expression. Examples are as follows:

int number_01;

int number_02;

Enter A value for number_01

Console.Write (" Please enter The value of number_01:");

Number_01=console.readline ();

Enter A value for number_02

Console.Write (" Please enter The value of number_02:");

Number_02=console.readline ();

if (number_01==number_02)

{

Console.WriteLine ("Number_01 and number_02 equal ");

}

if (number_01!=number_02)

{

Console.WriteLine ("Number_01 and number_02 Not equal ");

}

if (number_01>number_02)

{

Console.WriteLine ("Number_01 greater than number_02");

}

if (number_01>=number_02)

{

Console.WriteLine ("Number_01 greater than or equal to number_02");

}

if (number_01<number_02)

{

Console.WriteLine ("Number_01 less than number_02");

}

if (number_01<=number_02)

{

Console.WriteLine ("Number_01 less than or equal to number_02");

}

2. logical expressions are made up of logical operators. Mainly include:&,| , ! , ^ .

rules for logic and & :

Logical and logical values on both sides are true, the result is true; otherwise false.

True&true=true

True&false=false

False&true=false

False&false=false

Logical OR rule:

Logical or logical values on either side are true, as long as there is one, the result is true.

True|true=true

True|false=true

False|true=true

False|false=false

The logic is not to take the opposite value.

！ false=true

!true=false

Logical XOR:

Logical XOR is false for both sides of the value , and the other case is true.

True^true=false

True^false=true

False^true=true

False^false=false

This article is from the "Smile" blog, please be sure to keep this source http://yiyiweixiao.blog.51cto.com/2476874/1969133

9, C # inside the relationship expression, logical expression