Statement and Expression in Programming

13 June 2026 (Source: ChatGPT Private)

What is a statement in programming for e.g, in javascript?

In programming, a statement is an instruction that tells the computer to do something.

In JavaScript, these are statements:

let name = "Sahil";      // Variable declaration statement
console.log(name);       // Expression statement
if (name === "Sahil") {  // If statement
  console.log("Hello");
}

Think of it this way:

Statement = a complete instruction.
Expression = code that produces a value.

Examples of expressions:

2 + 3
name
isLoggedIn && isAdmin

Examples of statements:

let x = 5;
x = x + 1;
console.log(x);
return x;
break;

A statement can contain expressions:

let x = 2 + 3;

Here:

2 + 3 → expression (produces 5)
let x = 2 + 3; → statement (declares and assigns a variable)

A simple analogy:

Expression = a noun/value (“5”, “John”, “true”)
Statement = a sentence/instruction (“Store 5 in x”, “Print John”)

Is console.log(“Hello”) part of if statement?

Yes.

In this code:

if (name === "Sahil") {
  console.log("Hello");
}

The if statement consists of:

The condition:
```
name === "Sahil"
```
(an expression)
The body:
```
{
  console.log("Hello");
}
```
(a block containing one statement)

console.log("Hello"); is its own statement, but it is also part of the body of the if statement.

You can think of it hierarchically:

If Statement
├─ Condition: name === "Sahil"
└─ Body (Block Statement)
   └─ Expression Statement
      └─ console.log("Hello")

So console.log("Hello"); is both:

a statement by itself, and
a statement contained within the if statement.

This site is open source. Improve this page.