# ratio_less() function in C++

The ratio_less() is an inbuilt function in C++ which checks if the ratio R1 is less than the ratio R2. It returns True if the ratio is less than ratio 2, else it returns false.

Syntax:

```template < class ratio1_name, class ratio2_name > ratio_less
```

Template Parameters: The function accepts two template parameters ratio1 and ratio2 which are to be compared.

Return value: The function returns a boolean value which is true if the ratio1 is less than ratio2 otherwise it returns false.

Below programs illustrates the above function:

Program 1:

 `// C++ program to illustrate the ` `// ratio_less function ` `#include ` `#include ` `using` `namespace` `std; ` `int` `main() ` `{ ` `    ``typedef` `ratio<3, 9> ratio1; ` `    ``typedef` `ratio<1, 3> ratio2; ` ` `  `    ``// check if R1::value) ` `        ``cout << ``"3/9 is less than 1/3"``; ` `    ``else` `        ``cout << ``"3/9 is not less than 1/3"``; ` ` `  `    ``return` `0; ` `} `

Output:

```3/9 is not less than 1/3
```

Program 2:

 `// C++ program to illustrate the ` `// ratio_less function ` `#include ` `#include ` `using` `namespace` `std; ` `int` `main() ` `{ ` `    ``typedef` `ratio<1, 2> ratio1; ` `    ``typedef` `ratio<4, 7> ratio2; ` ` `  `    ``// check if R1::value) ` `        ``cout << ``"1/2 is less than 4/7"``; ` `    ``else` `        ``cout << ``"1/2 is not less than 4/7"``; ` ` `  `    ``return` `0; ` `} `

Output:

```1/2 is less than 4/7
```

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