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Modulus of two float or double numbers
• Difficulty Level : Basic
• Last Updated : 22 Dec, 2020

Given two floating-point numbers, find the remainder.

Examples:

Input: a = 36.5, b = 5.0
Output: 1.5

Input: a = 9.7, b = 2.3
Output: 0.5

A simple solution is to do repeated subtraction.

## C++

 `// C++ program to find modulo of floating ` `// point numbers.` `#include ` `using` `namespace` `std;`   `double` `findMod(``double` `a, ``double` `b)` `{` `    ``double` `mod;` `    ``// Handling negative values` `    ``if` `(a < 0)` `        ``mod = -a;` `    ``else` `        ``mod =  a;` `    ``if` `(b < 0)` `        ``b = -b;`   `    ``// Finding mod by repeated subtraction` `    `  `    ``while` `(mod >= b)` `        ``mod = mod - b;`   `    ``// Sign of result typically depends` `    ``// on sign of a.` `    ``if` `(a < 0)` `        ``return` `-mod;`   `    ``return` `mod;` `}`   `// Driver Function` `int` `main()` `{` `    ``double` `a = 9.7, b = 2.3;` `    ``cout << findMod(a, b);` `    ``return` `0;` `}`

## Java

 `// Java program to find modulo of floating ` `// point numbers`   `class` `GFG` `{` `    ``static` `double` `findMod(``double` `a, ``double` `b)` `    ``{` `        ``// Handling negative values` `        ``if` `(a < ``0``)` `            ``a = -a;` `        ``if` `(b < ``0``)` `            ``b = -b;` `    `  `        ``// Finding mod by repeated subtraction` `        ``double` `mod = a;` `        ``while` `(mod >= b)` `            ``mod = mod - b;` `    `  `        ``// Sign of result typically depends` `        ``// on sign of a.` `        ``if` `(a < ``0``)` `            ``return` `-mod;` `    `  `        ``return` `mod;` `    ``}` `    `  `    ``// Driver code ` `    ``public` `static` `void` `main (String[] args)` `    ``{` `        ``double` `a = ``9.7``, b = ``2.3``;` `        ``System.out.print(findMod(a, b));` `    ``}` `}`   `// This code is contributed by Anant Agarwal.`

## Python3

 `# Python3 program to find modulo ` `# of floating point numbers.`   `def` `findMod(a, b):`   `    ``# Handling negative values` `    ``if` `(a < ``0``):` `        ``a ``=` `-``a` `    ``if` `(b < ``0``):` `        ``b ``=` `-``b`   `    ``# Finding mod by repeated subtraction` `    ``mod ``=` `a` `    ``while` `(mod >``=` `b):` `        ``mod ``=` `mod ``-` `b`   `    ``# Sign of result typically ` `    ``# depends on sign of a.` `    ``if` `(a < ``0``):` `        ``return` `-``mod`   `    ``return` `mod`   `# Driver code` `a ``=` `9.7``; b ``=` `2.3` `print``(findMod(a, b))`   `# This code is contributed by Anant Agarwal.`

## C#

 `// C# program to find modulo of floating ` `// point numbers` `using` `System;`   `class` `GFG {` `    `  `    ``static` `double` `findMod(``double` `a, ``double` `b)` `    ``{` `        `  `        ``// Handling negative values` `        ``if` `(a < 0)` `            ``a = -a;` `        ``if` `(b < 0)` `            ``b = -b;` `    `  `        ``// Finding mod by repeated subtraction` `        ``double` `mod = a;` `        ``while` `(mod >= b)` `            ``mod = mod - b;` `    `  `        ``// Sign of result typically depends` `        ``// on sign of a.` `        ``if` `(a < 0)` `            ``return` `-mod;` `    `  `        ``return` `mod;` `    ``}` `    `  `    ``// Driver code ` `    ``public` `static` `void` `Main ()` `    ``{` `        `  `        ``double` `a = 9.7, b = 2.3;` `        `  `        ``Console.WriteLine(findMod(a, b));` `    ``}` `}`   `// This code is contributed by vt_m.`

## PHP

 `= ``\$b``)` `        ``\$mod` `= ``\$mod` `- ``\$b``;`   `    ``// Sign of result typically ` `    ``// depends on sign of a.` `    ``if` `(``\$a` `< 0)` `        ``return` `-``\$mod``;`   `    ``return` `\$mod``;` `}`   `    ``// Driver Code` `    ``\$a` `= 9.7; ``\$b` `= 2.3;` `    ``echo` `findMod(``\$a``, ``\$b``);` `    `  `// This code is contributed by anuj_65.` `?>`

Output :

`0.5`

We can use the inbuilt fmod function to find the modulus of two floating-point numbers.

## C++

 `// CPP program to find modulo of floating ` `// point numbers using library function.` `#include ` `using` `namespace` `std;`   `// Driver Function` `int` `main()` `{` `    ``double` `a = 9.7, b = 2.3;` `    ``cout << ``fmod``(a, b);` `    ``return` `0;` `}`

## Python3

 `# Python3 program to find modulo of floating` `# point numbers using library function.` `from` `math ``import` `fmod`   `# Driver code` `if` `__name__ ``=``=` `'__main__'``:` `    `  `    ``a ``=` `9.7` `    ``b ``=` `2.3` `    `  `    ``print``(fmod(a, b))`   `# This code is contributed by mohit kumar 29`

## PHP

 ``

Output:

`0.5`

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