What are primitive data types in C++?

What is a variable?

Variables are a fundamental part of programming. In C++, a data type is used to declare or define each variable. For instance, if a variable can hold integers or if it can also store other symbols.

Primitive data types

The following data types are frequently used in C++:

int: This is used to store integer values such as 1, -1, 7, etc.
```
int i = 5;
```
float and double: Both these data types store floating point values such as 1.56, 2.87, -4.7, etc. The difference between these two data types is the size. We can store up to 8 bytes in a double variable while only 4 in a float variable.
```
float f = 5.65;
double d = 7.8987;
```
bool: This is used to store two states: true/1 or false/0. If we want to store a number with a more significant value, our choice would be double.
```
bool b = true;
// or we can also declare bool as this
bool b = 0;
```
char: This is used to store a single character value such as a, A, #, etc.
```
char c = 'A';
```
string: This is used to store text such as Welcome to Educative, @Answers, etc.
```
string s = "This is a string";
```

#include <iostream>
#include <string>
using namespace std;
int main() 
{
  int number = 5;
  float decimal1 = 5.87;
  double decimal2 = 87.0987;
  bool state1 = true;
  bool state2 = 0;
  char letter = 'A';
  string text = "Welcome to Educative";
  cout << "The integer value is: " << number << endl;
  cout << "The float value is: " << decimal1 << endl;
  cout << "The double value is: " << decimal2 << endl;
  cout << "We can write boolean value in two forms as: " << state1 << " and " << state2 << endl;
  cout << "The character value is: " << letter << endl;
  cout << "The string value is: " << text << endl;
  return 0;
}

Explanation

Line 2: We’ll add #include <string> library for using string.
Line 7: Initialize an int variable number and assign a value of 5.
Line 8: Initialize a float variable decimal1 and assign a value of 5.87.
Line 9: Initialize a double variable decimal2 and assign a value of 87.0987.
Line 10–11: Initialize a bool variable state1 and state2 and assign a value true and 0, respectively. Another way to assign value to a bool is to assign 0/1 to the variable. But when we print the value of state1 it prints 1, not true.
Line 12: Initialize a char variable letter and assign a value A.
Line 13: Initialize a string variable text and assign a Welcome to Educative value.
Line 15–20: Displaying the values of variables by prompting a message.

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What are primitive data types in C++?

What is a variable?

Primitive data types

Example

Explanation