# How do you do log base 2 in C?

## How do you do log base 2 in C?

However, if you are using C language and you want the result in integer, you can use the following: int result = (int)(ceil(log(x) / log(2))); Hope this helps. Consult your basic mathematics course, log n / log 2 .

**Does C have log2?**

14 Answers. where y can be anything, which for standard log functions is either 10 or e. C99 has log2 (as well as log2f and log2l for float and long double). If you’re looking for an integral result, you can just determine the highest bit set in the value and return its position.

**What is the base of log C?**

e

In the C Programming Language, the log function returns the logarithm of x to the base of e.

### What is Floor function C?

In the C Programming Language, the floor function returns the largest integer that is smaller than or equal to x (ie: rounds downs the nearest integer).

**What does log2 return in C?**

The log2() function in C++ returns the base-2 logarithm of the argument. The function is defined in header file….log2() Return value.

Parameter (x) | Return Value |
---|---|

0 > x > 1 | Negative |

x = 0 | -∞ (- infinity) |

x < 0 | NaN (Not a Number) |

**How do you put log base 2 into a calculator?**

Example: If you to calculate log(x) base 2, then calculate log(x) base 10 then divide it by log2. Or, to calculate ln(x) base 2, do it with base 10 then divide it by ln2.

#### How to write log base ( 2 ) in C?

Simple math: log 2 (x) = log y (x) / log y (2) where y can be anything, which for standard log functions is either 10 or e.

**How to calculate the logarithm of a base?**

One can easily calculate the logarithm of any base using the following simple equation: Where log k is the function that returns the base-k logarithm of a number, and it can be any real number.

**How to calculate base 2 and base n in C?**

Write a C Program to calculate Base-2 and Base-N logarithm by recursion. Here’s simple Program to calculate Base-2 and Base-N logarithm using recursion in C Programming Language.

## Which is the function that returns the base-k logarithm?

Where log k is the function that returns the base-k logarithm of a number, and it can be any real number. Below is the source code for C Program to calculate Base-2 and Base-N logarithm by recursion which is successfully compiled and run on Windows System to produce desired output as shown below :