I am reading this material to understand the basics of number system.I am stuck at a point in that material where it writes the algorithm to convert a decimal number to binary number.The heading of that part where I am stuck is Decimal to BaseThe algorithm (may be presented less than faithfully, please refer the link) it mentions there is:Let $p = \lfloor \sqrt{V} \rfloor$Let $v = \lfloor \dfrac V {B^p} \rfloor$  (v is the next digit to the right)Make $V = V  v * B^p$Repeat steps 1 through 3 until $p = 0$It is explaining by taking an example of converting decimal number 236 to binary.I am not getting how it is calculating the 1st step, i.e. to get the value of p.It writes that p = int(square root of V)Now, square root of 236 = 15.36229149573721635154As per point number 1, p = integer part of 15.36229149573721635154So, I remove the decimal part and p then becomes 15. But the material there says it is 7.I can't get what is happening here. I am stuck. 
Algorithm to convert decimal number to binary
algorithms;number formats;base conversion
Just converting the comment into a short answer:$7 = \text{int}(\log_{2} 236)$. Generally, $p = \text{int}(\log_{B}V)$.As other people pointed out, this algorithm is needlessly complicated and not practical; it is not easy to calculate $\log_B V$ for large $V$ by pencil and paper. Instead, use the other algorithm which is also mentioned in the article you are reading:From decimal to binaryStep 1: Check if your number is odd or even.Step 2: If it's even, write 0 (proceeding backwards, adding binary digits to the left of the result).Step 3: Otherwise, if it's odd, write 1 (in the same way).Step 4: Divide your number by 2 (dropping any fraction) and go back to step 1. Repeat until your original number is 0.