# Larger of a^b or b^a (a raised to power b or b raised to power a)

Given two numbers , find which is greater .

If , print a^b is greater

If , print b^a is greater

If , print Both are equal**Examples:**

Input :3 5Output :a^b is greater 3^5 = 243, 5^3 = 125. Since, 243>125, therefore a^b > b^a.Input :2 4Output :Both are equal 2^4 = 16, 4^2 = 16. Since, 16=16, therefore a^b = b^a.

**Brute Force** solution would be to just compute and compare them. But since can be large enough that can not be stored even in long long int, so this solution is not feasible. Also computing to the power n would require at least time using the fast exponentiation technique.**Efficient approach** would be to use logarithm. We have to compare . If we take log, the problem reduces to comparing .

Hence,

If , print a^b is greater

If , print b^a is greater

If , print Both are equal

Below is the implementation of the efficient approach discussed above.

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## C++

`// C++ code for finding greater` `// between the a^b and b^a` `#include <bits/stdc++.h>` `using` `namespace` `std;` `// Function to find the greater value` `void` `findGreater(` `int` `a, ` `int` `b)` `{` ` ` `long` `double` `x = (` `long` `double` `)a * (` `long` `double` `)(` `log` `((` `long` `double` `)(b)));` ` ` `long` `double` `y = (` `long` `double` `)b * (` `long` `double` `)(` `log` `((` `long` `double` `)(a)));` ` ` `if` `(y > x) {` ` ` `cout << ` `"a^b is greater"` `<< endl;` ` ` `}` ` ` `else` `if` `(y < x) {` ` ` `cout << ` `"b^a is greater"` `<< endl;` ` ` `}` ` ` `else` `{` ` ` `cout << ` `"Both are equal"` `<< endl;` ` ` `}` `}` `// Driver code` `int` `main()` `{` ` ` `int` `a = 3, b = 5, c = 2, d = 4;` ` ` `findGreater(a, b);` ` ` `findGreater(c, d);` ` ` `return` `0;` `}` |

## Java

`// Java code for finding greater` `// between the a^b and b^a` `public` `class` `GFG{` ` ` `// Function to find the greater value` ` ` `static` `void` `findGreater(` `int` `a, ` `int` `b)` ` ` `{` ` ` `double` `x = (` `double` `)a * (` `double` `)(Math.log((` `double` `)(b)));` ` ` `double` `y = (` `double` `)b * (` `double` `)(Math.log((` `double` `)(a)));` ` ` `if` `(y > x) {` ` ` `System.out.println(` `"a^b is greater"` `) ;` ` ` `}` ` ` `else` `if` `(y < x) {` ` ` `System.out.println(` `"b^a is greater"` `) ;` ` ` `}` ` ` `else` `{` ` ` `System.out.println(` `"Both are equal"` `) ;` ` ` `}` ` ` `}` ` ` ` ` `// Driver code` ` ` `public` `static` `void` `main(String []args)` ` ` `{` ` ` `int` `a = ` `3` `, b = ` `5` `, c = ` `2` `, d = ` `4` `;` ` ` `findGreater(a, b);` ` ` `findGreater(c, d);` ` ` `}` ` ` `// This code is contributed by Ryuga` `}` |

## Python 3

`# Python 3 code for finding greater` `# between the a^b and b^a` `import` `math` `# Function to find the greater value` `def` `findGreater(a, b):` ` ` `x ` `=` `a ` `*` `(math.log(b));` ` ` `y ` `=` `b ` `*` `(math.log(a));` ` ` `if` `(y > x):` ` ` `print` `(` `"a^b is greater"` `);` ` ` `elif` `(y < x):` ` ` `print` `(` `"b^a is greater"` `);` ` ` `else` `:` ` ` `print` `(` `"Both are equal"` `);` `# Driver code` `a ` `=` `3` `;` `b ` `=` `5` `;` `c ` `=` `2` `;` `d ` `=` `4` `;` `findGreater(a, b);` `findGreater(c, d);` `# This code is contributed` `# by Shivi_Aggarwal` |

## C#

`// C# code for finding greater` `// between the a^b and b^a` ` ` `using` `System;` `public` `class` `GFG{` ` ` ` ` `// Function to find the greater value` ` ` `static` `void` `findGreater(` `int` `a, ` `int` `b)` ` ` `{` ` ` `double` `x = (` `double` `)a * (` `double` `)(Math.Log((` `double` `)(b)));` ` ` `double` `y = (` `double` `)b * (` `double` `)(Math.Log((` `double` `)(a)));` ` ` `if` `(y > x) {` ` ` `Console.Write(` `"a^b is greater\n"` `) ;` ` ` `}` ` ` `else` `if` `(y < x) {` ` ` `Console.Write(` `"b^a is greater"` `+` `"\n"` `) ;` ` ` `}` ` ` `else` `{` ` ` `Console.Write(` `"Both are equal"` `) ;` ` ` `}` ` ` `}` ` ` ` ` `// Driver code` ` ` `public` `static` `void` `Main()` ` ` `{` ` ` `int` `a = 3, b = 5, c = 2, d = 4;` ` ` `findGreater(a, b);` ` ` `findGreater(c, d);` ` ` `}` ` ` `}` |

## PHP

`<?php` `// PHP code for finding greater` `// between the a^b and b^a` `// Function to find the greater value` `function` `findGreater(` `$a` `, ` `$b` `)` `{` ` ` `$x` `= (double)` `$a` `* (double)(log((double)(` `$b` `)));` ` ` `$y` `= (double)` `$b` `* (double)(log((double)(` `$a` `)));` ` ` `if` `(` `$y` `> ` `$x` `)` ` ` `{` ` ` `echo` `"a^b is greater"` `, ` `"\n"` `;` ` ` `}` ` ` `else` `if` `(` `$y` `< ` `$x` `)` ` ` `{` ` ` `echo` `"b^a is greater"` `, ` `"\n"` `;` ` ` `}` ` ` `else` ` ` `{` ` ` `echo` `"Both are equal"` `, ` `"\n"` `;` ` ` `}` `}` `// Driver code` `$a` `= 3;` `$b` `= 5;` `$c` `= 2;` `$d` `= 4;` `findGreater(` `$a` `, ` `$b` `);` `findGreater(` `$c` `, ` `$d` `);` `// This code is contributed by ajit` `?>` |

## Javascript

`<script>` `// javascript code for finding greater` `// between the a^b and b^a` ` ` `// Function to find the greater value` ` ` `function` `findGreater(a , b) {` ` ` `var` `x = a * (Math.log( (b)));` ` ` `var` `y = b * (Math.log( (a)));` ` ` `if` `(y > x) {` ` ` `document.write(` `"a^b is greater<br/>"` `);` ` ` `} ` `else` `if` `(y < x) {` ` ` `document.write(` `"b^a is greater<br/>"` `);` ` ` `} ` `else` `{` ` ` `document.write(` `"Both are equal<br/>"` `);` ` ` `}` ` ` `}` ` ` `// Driver code` ` ` ` ` `var` `a = 3, b = 5, c = 2, d = 4;` ` ` `findGreater(a, b);` ` ` `findGreater(c, d);` `// This code is contributed by todaysgaurav` `</script>` |

**Output:**

a^b is greater Both are equal

**Time Complexity:** O(1)

**Auxiliary Space:** O(1)