# Perfect cubes in a range

Given two given numbers a and b where 1 <= a <= b, find perfect cubes between a and b (a and b inclusive).**Examples:**

Input : a = 1, b = 100 Output : 1 8 27 64 Perfect cubes in the given range are 1, 8, 27, 64 Input : a = 24, b = 576 Output : 27 64 125 216 343 512 Perfect cubes in the given range are 27, 64, 125, 216, 343, 512

This problem is similar to Perfect squares between two numbers.**Method 1 (Naive) :** One naive approach is to check all the numbers between a and b (inclusive a and b)

and print the perfect cube. Following is the code for the above approach:

## C++

`// A Simple Method to count cubes between a and b` `#include <bits/stdc++.h>` `using` `namespace` `std;` `void` `printCubes(` `int` `a, ` `int` `b)` `{` ` ` `// Traverse through all numbers in given range` ` ` `// and one by one check if number is prime` ` ` `for` `(` `int` `i = a; i <= b; i++) {` ` ` `// Check if current number 'i'` ` ` `// is perfect cube` ` ` `for` `(` `int` `j = 1; j * j * j <= i; j++) {` ` ` `if` `(j * j * j == i) {` ` ` `cout << j * j * j << ` `" "` `;` ` ` `break` `;` ` ` `}` ` ` `}` ` ` `}` `}` `// Driver code` `int` `main()` `{` ` ` `int` `a = 1, b = 100;` ` ` `cout << ` `"Perfect cubes in given range:\n "` `;` ` ` `printCubes(a, b);` ` ` `return` `0;` `}` |

## Java

`// A Simple Method to count cubes between a and b` `class` `Test {` ` ` `static` `void` `printCubes(` `int` `a, ` `int` `b)` ` ` `{` ` ` `// Traverse through all numbers in given range` ` ` `// and one by one check if number is prime` ` ` `for` `(` `int` `i = a; i <= b; i++) {` ` ` `// Check if current number 'i'` ` ` `// is perfect cube` ` ` `for` `(` `int` `j = ` `1` `; j * j * j <= i; j++) {` ` ` `if` `(j * j * j == i) {` ` ` `System.out.print(j * j * j + ` `" "` `);` ` ` `break` `;` ` ` `}` ` ` `}` ` ` `}` ` ` `}` ` ` `// Driver method` ` ` `public` `static` `void` `main(String[] args)` ` ` `{` ` ` `int` `a = ` `1` `, b = ` `100` `;` ` ` `System.out.println(` `"Perfect cubes in given range:"` `);` ` ` `printCubes(a, b);` ` ` `}` `}` |

## Python3

`# A Simple Method to count cubes between a and b` `def` `printCubes(a, b) :` ` ` `# Traverse through all numbers in given range` ` ` `# and one by one check if number is prime` ` ` `for` `i ` `in` `range` `(a, b ` `+` `1` `) :` ` ` ` ` `# Check if current number 'i'` ` ` `# is perfect cube` ` ` `j ` `=` `1` ` ` `for` `j ` `in` `range` `(j ` `*` `*` `3` `, i ` `+` `1` `) :` ` ` ` ` `if` `(j ` `*` `*` `3` `=` `=` `i) :` ` ` `print` `( j ` `*` `*` `3` `, end ` `=` `" "` `)` ` ` `break` ` ` `# Driver code` `a ` `=` `1` `; b ` `=` `100` `print` `(` `"Perfect cubes in given range: "` `)` `printCubes(a, b)` `# This code is contributed by Nikita Tiwari.` |

## C#

`// A Simple Method to count cubes` `// between a and b` `using` `System;` `class` `GFG {` ` ` `static` `void` `printCubes(` `int` `a, ` `int` `b)` ` ` `{` ` ` `// Traverse through all numbers` ` ` `// in given range and one by` ` ` `// one check if number is prime` ` ` `for` `(` `int` `i = a; i <= b; i++) {` ` ` `// Check if current number 'i'` ` ` `// is perfect cube` ` ` `for` `(` `int` `j = 1; j * j * j <= i; j++) {` ` ` `if` `(j * j * j == i) {` ` ` `Console.Write(j * j * j + ` `" "` `);` ` ` `break` `;` ` ` `}` ` ` `}` ` ` `}` ` ` `}` ` ` `// Driver method` ` ` `public` `static` `void` `Main()` ` ` `{` ` ` `int` `a = 1, b = 100;` ` ` `Console.WriteLine(` `"Perfect cubes in"` ` ` `+ ` `" given range:"` `);` ` ` `printCubes(a, b);` ` ` `}` `}` `// This code contribute by parashar.` |

## PHP

`<?php` `// A Simple Method to count` `// cubes between a and b` `function` `printCubes(` `$a` `, ` `$b` `)` `{` ` ` ` ` `// Traverse through all` ` ` `// numbers in given range` ` ` `// and one by one check` ` ` `// if number is prime` ` ` `for` `(` `$i` `= ` `$a` `; ` `$i` `<= ` `$b` `; ` `$i` `++)` ` ` `{` ` ` ` ` `// Check if current number 'i'` ` ` `// is perfect cube` ` ` `for` `(` `$j` `= 1; ` `$j` `* ` `$j` `* ` `$j` `<= ` `$i` `; ` `$j` `++)` ` ` `{` ` ` `if` `(` `$j` `* ` `$j` `* ` `$j` `== ` `$i` `)` ` ` `{` ` ` `echo` `$j` `* ` `$j` `* ` `$j` `, ` `" "` `;` ` ` `break` `;` ` ` `}` ` ` `}` ` ` `}` `}` ` ` ` ` `// Driver Code` ` ` `$a` `= 1;` ` ` `$b` `= 100;` ` ` `echo` `"Perfect cubes in given range:\n "` `;` ` ` `printCubes(` `$a` `, ` `$b` `);` `// This code is contributed by ajit` `?>` |

## Javascript

`<script>` `// A Simple Method to count` `// cubes between a and b` `function` `printCubes(a, b)` `{` ` ` ` ` `// Traverse through all` ` ` `// numbers in given range` ` ` `// and one by one check` ` ` `// if number is prime` ` ` `for` `(let i = a; i <= b; i++)` ` ` `{` ` ` ` ` `// Check if current number 'i'` ` ` `// is perfect cube` ` ` `for` `(let j = 1; j * j * j <= i; j++)` ` ` `{` ` ` `if` `(j * j * j == i)` ` ` `{` ` ` `document.write(j * j * j + ` `" "` `);` ` ` `break` `;` ` ` `}` ` ` `}` ` ` `}` `}` ` ` ` ` `// Driver Code` ` ` `let a = 1;` ` ` `let b = 100;` ` ` `document.write(` `"Perfect cubes in given range: <br> "` `);` ` ` `printCubes(a, b);` `// This code is contributed by gfgking.` `</script>` |

Output :

Perfect cubes in given range: 1 8 27 64

**Method 2 (Efficient):**

We can simply take cube root of â€˜aâ€™ and cube root of â€˜bâ€™ and print the cubes of number between them.

1- Given a = 24 b = 576 2- acr = cbrt(a)) bcr = cbrt(b) acr = 3 and bcr = 8 3- Print cubes of 3 to 8 that comes under the range of a and b(including a and b both) 27, 64, 125, 216, 343, 512

Below is implementation of above steps.

## C++

`// Efficient method to print cubes` `// between a and b` `#include <cmath>` `#include <iostream>` `using` `namespace` `std;` `// An efficient solution to print perfect` `// cubes between a and b` `void` `printCubes(` `int` `a, ` `int` `b)` `{` ` ` `// Find cube root of both a and b` ` ` `int` `acrt = cbrt(a);` ` ` `int` `bcrt = cbrt(b);` ` ` `// Print cubes between acrt and bcrt` ` ` `for` `(` `int` `i = acrt; i <= bcrt; i++)` ` ` `if` `(i * i * i >= a && i * i * i <= b)` ` ` `cout << i * i * i << ` `" "` `;` `}` `// Driver code` `int` `main()` `{` ` ` `int` `a = 24, b = 576;` ` ` `cout << ` `"Perfect cubes in given range:\n"` ` ` `<< printCubes(a, b);` ` ` `return` `0;` `}` |

## Java

`// Java progroam for Efficient method` `// to print cubes between a and b` `class` `Test {` ` ` `// An efficient solution to print perfect` ` ` `// cubes between a and b` ` ` `static` `void` `printCubes(` `int` `a, ` `int` `b)` ` ` `{` ` ` `// Find cube root of both a and b` ` ` `int` `acrt = (` `int` `)Math.cbrt(a);` ` ` `int` `bcrt = (` `int` `)Math.cbrt(b);` ` ` `// Print cubes between acrt and bcrt` ` ` `for` `(` `int` `i = acrt; i <= bcrt; i++)` ` ` `if` `(i * i * i >= a && i * i * i <= b)` ` ` `System.out.print(i * i * i + ` `" "` `);` ` ` `}` ` ` `// Driver method` ` ` `public` `static` `void` `main(String[] args)` ` ` `{` ` ` `int` `a = ` `24` `, b = ` `576` `;` ` ` `System.out.println(` `"Perfect cubes in given range:"` `);` ` ` `printCubes(a, b);` ` ` `}` `}` |

## Python3

`# Python3 code for Efficient method ` `# to print cubes between a and b` `def` `cbrt(n) :` ` ` `return` `(` `int` `)( n ` `*` `*` `(` `1.` `/` `3` `))` `# An efficient solution to print` `# perfect cubes between a and b` `def` `printCubes(a, b) :` ` ` ` ` `# Find cube root of` ` ` `# both a and b` ` ` `acrt ` `=` `cbrt(a)` ` ` `bcrt ` `=` `cbrt(b)` ` ` `# Print cubes between acrt and bcrt` ` ` `for` `i ` `in` `range` `(acrt, bcrt ` `+` `1` `) :` ` ` `if` `(i ` `*` `i ` `*` `i >` `=` `a ` `and` `i ` `*` `i ` `*` `i <` `=` `b) :` ` ` `print` `(i ` `*` `i ` `*` `i, ` `" "` `, end ` `=` `"")` `# Driver code` `a ` `=` `24` `b ` `=` `576` `print` `(` `"Perfect cubes in given range:"` `)` `printCubes(a, b)` `# This code is contributed` `# by Nikita Tiwari.` |

## C#

`// C# progroam for Efficient` `// method to print cubes` `// between a and b` `using` `System;` `class` `GFG` `{` ` ` `// An efficient solution` ` ` `// to print perfect` ` ` `// cubes between a and b` ` ` `static` `void` `printCubes(` `int` `a,` ` ` `int` `b)` ` ` `{` ` ` `// Find cube root of` ` ` `// both a and b` ` ` `int` `acrt = (` `int` `)Math.Pow(a,` ` ` `(` `double` `)1 / 3);` ` ` `int` `bcrt = (` `int` `)Math.Pow(b,` ` ` `(` `double` `)1 / 3);` ` ` `// Print cubes between` ` ` `// acrt and bcrt` ` ` `for` `(` `int` `i = acrt;` ` ` `i <= bcrt; i++)` ` ` `if` `(i * i * i >= a &&` ` ` `i * i * i <= b)` ` ` `Console.Write(i * i *` ` ` `i + ` `" "` `);` ` ` `}` ` ` `// Driver Code` ` ` `static` `public` `void` `Main ()` ` ` `{` ` ` `int` `a = 24;` ` ` `int` `b = 576;` ` ` `Console.WriteLine(` `"Perfect cubes "` `+` ` ` `"in given range:"` `);` ` ` `printCubes(a, b);` ` ` `}` `}` `// This code is contributed` `// by ajit` |

## PHP

`<?php` `// Efficient method to print` `// cubes between a and b` `// An efficient solution` `// to print perfect` `// cubes between a and b` `function` `printCubes(` `$a` `, ` `$b` `)` `{` ` ` `// Find cube root` ` ` `// of both a and b` ` ` `$acrt` `= (int)pow(` `$a` `, 1 / 3);` ` ` `$bcrt` `= (int)pow(` `$b` `, 1 / 3);` ` ` `// Print cubes between` ` ` `// acrt and bcrt` ` ` `for` `(` `$i` `= ` `$acrt` `; ` `$i` `<= ` `$bcrt` `; ` `$i` `++)` ` ` `if` `(` `$i` `* ` `$i` `* ` `$i` `>= ` `$a` `&&` ` ` `$i` `* ` `$i` `* ` `$i` `<= ` `$b` `)` ` ` `echo` `$i` `* ` `$i` `* ` `$i` `, ` `" "` `;` `}` `// Driver code` `$a` `= 24; ` `$b` `= 576;` `echo` `"Perfect cubes in given range:\n"` `,` ` ` `printCubes(` `$a` `, ` `$b` `);` `// This code is contributed by ajit` `?>` |

## Javascript

`<script>` ` ` `// Javascript progroam for Efficient` ` ` `// method to print cubes` ` ` `// between a and b` ` ` ` ` `// An efficient solution` ` ` `// to print perfect` ` ` `// cubes between a and b` ` ` `function` `printCubes(a, b)` ` ` `{` ` ` `// Find cube root of` ` ` `// both a and b` ` ` `let acrt = parseInt(Math.pow(a, 1 / 3), 10);` ` ` `let bcrt = parseInt(Math.pow(b, 1 / 3), 10);` ` ` ` ` `// Print cubes between` ` ` `// acrt and bcrt` ` ` `for` `(let i = acrt; i <= bcrt; i++)` ` ` `if` `(i * i * i >= a && i * i * i <= b)` ` ` `document.write((i * i * i) + ` `" "` `);` ` ` `}` ` ` ` ` `let a = 24;` ` ` `let b = 576;` ` ` `document.write(` `"Perfect cubes "` `+ ` `"in given range:"` `+ ` `"</br>"` `);` ` ` `printCubes(a, b);` ` ` ` ` `// This code is contributed by rameshtravel07.` `</script>` |

**Output:**

Perfect cubes in given range: 27 64 125 216 343 512

This article is contributed by **Sahil Chhabra**. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

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