# Pascal - Relational Operators

Following table shows all the relational operators supported by Pascal. Assume variable A holds 10 and variable B holds 20, then −

Operator Description Example
= Checks if the values of two operands are equal or not, if yes, then condition becomes true. (A = B) is not true.
<> Checks if the values of two operands are equal or not, if values are not equal, then condition becomes true. (A <> B) is true.
> Checks if the value of left operand is greater than the value of right operand, if yes, then condition becomes true. (A > B) is not true.
< Checks if the value of left operand is less than the value of right operand, if yes, then condition becomes true. (A < B) is true.
>= Checks if the value of left operand is greater than or equal to the value of right operand, if yes, then condition becomes true. (A >= B) is not true.
<= Checks if the value of left operand is less than or equal to the value of right operand, if yes, then condition becomes true. (A <= B) is true.

Try the following example to understand all the relational operators available in Pascal programming language −

```program showRelations;
var
a, b: integer;

begin
a := 21;
b := 10;

if a = b then
writeln('Line 1 - a is equal to b' )
else
writeln('Line 1 - a is not equal to b' );

if  a < b then
writeln('Line 2 - a is less than b' )
else
writeln('Line 2 - a is not less than b' );

if  a > b then
writeln('Line 3 - a is greater than b' )
else
writeln('Line 3 - a is greater than b' );

(* Lets change value of a and b *)
a := 5;
b := 20;

if  a <= b then
writeln('Line 4 - a is either less than or equal to b' );

if ( b >= a ) then
writeln('Line 5 - b is either greater than  or equal to ' );
end.
```

When the above code is compiled and executed, it produces the following result:

```Line 1 - a is not equal to b
Line 2 - a is not less than b
Line 3 - a is greater than b
Line 4 - a is either less than or equal to b
Line 5 - b is either greater than or equal to b
```
pascal_operators.htm