Print Hello World Without Semicolon in C++

In this article, we will learn to print Hello World without a semicolon in C++. The semicolon (;) is used to terminate statements. The above can be achieved by using control structures like loops, conditionals, or function calls.

Different Approaches

There are multiple ways to write a C++ program without semicolons ?

• Using if Statements
• Using a while Loop
• Using Switch Statement

Note: Doing this is a very bad practice and should never be used in real code. This is presented just as informational content.

Using if Statements

The easiest way to write a C++ Program without Semicolons is by using if statements. Almost all statements in C++ can be treated as expressions. So, if we place the statement inside an if statement with a blank pair of parentheses, we don't have to end it with a semicolon anymore.

Example

Below is an example of printing Hello World without a semicolon using an if statement ?

#include<iostream>
using namespace std;

int main() {
   if (std::cout << "Hello world!") {}
}

Output

Hello World

Example

You can even take inputs, declare variables, define functions, etc this way. For example ?

#include<iostream>
using namespace std;

int main() {
   if (int N = 1) {
      if (std::cin >> N) {}
      if (std::cout << N) {}
   }
}

Output

This will give the output(if you enter the number 21) ?

21

Using a while Loop

A while loop can execute std::cout without a semicolon, and break exits the loop immediately after printing.

Example

Below is an example of printing Hello World without a semicolon using a while loop ?

#include <iostream>
using namespace std;

int main() {
    while (std::cout << "Hello, World!\n") break;
}

Output

Hello World

Using Switch Statement

A switch case can execute std::cout inside a case block without a semicolon. switch(1) ensures a valid case is always executed and case 1 then prints the message in the block.

Example

Below is an example of printing Hello World without a semicolon using a switch Statement ?

#include <iostream>
using namespace std;

int main() {
    switch (1) {
        case 1: std::cout << "Hello, World!\n";
    }
}

Output

Hello World