C # comparison operations

Comparing values when programming allows you to check the relationships between variables. The result of the check is always true or false.

The C # language provides the following comparison operators:

Examples of the use of

a comparison of two values, and assign the result to a variable of type bool
bool, check = 18 > = 7;


use of the result of the comparison in the conditional statement. The resulting value 
It's true, so the code will perform
If (check)
Console. WriteLine ("Yes, 18 is greater than 7);


Displays false because 45 and 12 are not equal
Console. WriteLine (45! = 12); 


Console. WriteLine (45 = = 40 + 5); Displays a value of "true" since the operators
comparisons are performed after arithmetic operations-performs
Add, and later comparison.


Displays false because 15 is not smaller than itself
Console. WriteLine (15 < 15);

Possible error

Due to the diversity of languages a person beginning with programming in C/C++/c # sometimes have a problem with checking whether two values are equal. To check it is necessary to apply operator “==”. The application in this case, the operator “=” will be resulted in incorrect action or mistake. In C/C++ for different types, and for c # only for bool, the value instead of the comparison would be entered into the variable. The example below will bring more problem.

The following incorrect example

bool, check = true,//a variable of type bool with a value of true
If (check = false)//there is no comparison, the value of the variable is set 
set to false and the value dopiera is checked by the conditional statement if
{
This code does not execute
}


Under the second, also a mistaken example

bool//zmienna = true; check type bool with a value of true
If (check = true)//there is no comparison, the value of the variable is set 
set to true and the value dopiera is checked by the conditional statement if
{
This code will be
}


The following correct example

bool, check = false; a variable of type bool with a value of false
If (check == false)//the value of the variable "check" is compared to "false". 
The values are equal, so the if conditional statement is "true" 
and passes to code execution
{
This code will be
}