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Relational or Comparison Operators & logical expressions - Java programming tutorial for beginners

In this video we are going to talk about Relational Operators
By definition, a relational operator is an operator that allows you to make comparisons in a program
Relational operators are used in logical expressions
And a logical or boolean expression is any expression that evaluates to either true or false

Let’s take an example to explain further
Suppose we have two integer variables
int a = 10;
int b = 28;

And we want to compare these two variables
To do that we will use a logical expression and that expression will contain a relational operator
Since a logical expression evaluates to a boolean value
Let us declare a boolean variable first

Now, let‘s write the logical expressions in which we will compare the two variables
c = (a==b);
c = (a!=b);
etc.

So here are the logical expressions
And, as you can notice in Java there exist 6 relational operators that allows you to make comparisons
the equal to operator
the not equal to operator
the less than or equal to operator
the less than operator
the greater than or equal to operator
the greater than operator

As I said, each of these expressions will compare the values in variables a and b before returning a boolean value that is either true or false

What we can note here is that each relational operators is a binary operator, that means that it requires two operands

Relational operators can be used with all primitive Data types which are short, long, double, float, integer and char as well

For char values, whether an expression evaluates to true or false depends on the Unicode value as a decimal integer of the characters in the character set

For example we can write
char d = ‘A’;
char e = ‘B’;

Then
c = (d == e);

So guys, that’s it concerning Relational Operators
In the next video, we will talk about Logical Operators

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