In this article, I'm trying to explain the basics of programming languages as simple as possible. Let's start from the beginning...
Code:
A set of special instructions to tell the computer what to do. Usually, the code is saved in a text file.
Syntax:
It is the rules for valid format and combinations of instructions is called a computer language.
Tip: While writing/Taking notes, enclosed syntax with a rectangle.
Statements:
A group of words, numbers, and operators that performs specific functions is called statements.
eg: a = b + 2 ;
where 'a' and 'b' are variables,
2 is a value/literal value,
and +, = are operators
Expressions:
An expression is any reference to a variable(s) or value(s) combined with operators. Statements are made up of one or more expressions.
eg: a = b + 2;
This statement has four expressions in it.
2 is literal value expression.
b is a variable.
b + 2 is an arithmetic expression.
a = b + 2 is an assignment expression.
Note: A general expression that stands alone is also called an expression statement
eg: b+2
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