floor() in C++

What is floor() in C++

In C++, the floor function returns the largest integer, which is less than or equal to the given argument. The floor in C++ is defined in the cmath header file in C++.

Example

Output

Explanation

The code discussed above passes a floating value of $2.7$ to the floor function as an argument. The largest integer which is less than or equal to $2.7$ is $2$. Thus the floor function returns an integer value of $2$ as the output.

Syntax of the floor in C++

The syntax of the floor in C++ is as follows:

We need to pass the argument inside the $floor()$ function of which we want the floor value as an output. The argument can be a real number of any data type.

Parameters of the floor in C++

The floor in C++, defined in the cmath header file, takes a floating-point number whose floor value is to be computed. The parameters can be of the type:

• double
• long double
• float

Note: When an integer value is passed inside the floor function as an argument, it is type cast into a double data type.

Return Value of floor in C++

The floor in C++ returns an integer value that is less than or equal to the argument passed in the floor function.

floor for Integer Values in C++

When an integer value is passed to the floor in C++ as an argument, the return value is equal to the argument itself.

Example

Output

floor for Double and Float Values in C++

When a floating-point number is passed as an argument, the floor in C++ returns the largest integer that is less than or equal to the argument.

Example

Output

Special Cases for floor in C++

Below are some of the special cases of the $floor$ in C++.

Output

See also

• Difference Between Call by Value and Call by Reference in C++,
• Vector in C++
• Comparing Two Strings in C++ .