C++ Keywords Reference 🎯

Welcome to our deep dive into the world of C++! In this comprehensive guide, we'll explore various C++ keywords that are essential for every programmer. Whether you're a beginner or an intermediate learner, this guide will help you understand these keywords from the ground up. Let's get started!

Basic Keywords 📝

Here are some basic C++ keywords that you'll encounter frequently:

int: Used to declare an integer variable.

cpp

int myNumber = 10;

float: Used to declare a floating-point number variable.

cpp

float myFloat = 10.5;

double: Used to declare a double-precision floating-point number variable.

cpp

double myDouble = 10.5;

char: Used to declare a character variable.

cpp

char myCharacter = 'A';

bool: Used to declare a boolean variable.

cpp

bool isTrue = true;

void: Used to declare functions that don't return a value.

cpp

void printMessage() {
  std::cout << "Hello, World!";
}

Control Structures Keywords 📝

Control structures are used to control the flow of your program. Here are some important keywords:

if: Used to execute a block of code if a certain condition is true.

cpp

if (myNumber > 10) {
  std::cout << "myNumber is greater than 10.";
}

else: Used to execute a block of code if the if condition is false.

cpp

if (myNumber > 10) {
  std::cout << "myNumber is greater than 10.";
} else {
  std::cout << "myNumber is not greater than 10.";
}

else if: Used to test multiple conditions.

cpp

if (myNumber > 10) {
  std::cout << "myNumber is greater than 10.";
} else if (myNumber < 5) {
  std::cout << "myNumber is less than 5.";
} else {
  std::cout << "myNumber is between 5 and 10.";
}

switch: Used to execute different blocks of code based on the value of an integer expression.

cpp

switch (myNumber) {
  case 10:
    std::cout << "myNumber is 10.";
    break;
  case 5:
    std::cout << "myNumber is 5.";
    break;
  default:
    std::cout << "myNumber is neither 5 nor 10.";
}

for: Used to repeat a block of code a specific number of times.

cpp

for (int i = 0; i < 10; i++) {
  std::cout << i << " ";
}

while: Used to repeat a block of code as long as a certain condition is true.

cpp

int i = 0;
while (i < 10) {
  std::cout << i << " ";
  i++;
}

do...while: Used to repeat a block of code at least once, as long as a certain condition is true.

cpp

int i = 0;
do {
  std::cout << i << " ";
  i++;
} while (i < 10);

Quiz 💡

Stay tuned for more! In the next part, we'll delve into more advanced C++ keywords and concepts. Happy coding! 💡