A __ number , can be thought__ of as a projection , used for example for measuring , be it time or distance , or for countig . A number is a discrete way of measuring , discrete as in … Read More

# Category: data structure and algorithms

# What is a signed number ?

The question, what is a `signed`

number, __ is actually the question__, of how to represent negative, zero, and positive integers, in a computer.

__ An integer __ is for example,

`-1`

or `1`

, or `0`

, so in other … Read More # What is an unsigned number ?

Asking what an `unsigned`

number or integer is, is actually asking, how to represent the non negative integers, such as `0`

, or `1`

in a computer.

An integer in mathematics, is any number which belong to … Read More

# binary search algorithm in python , and php

# Permutate a string letters recursively in python

Let us say we have a string and we want to permutate through its letter . So for example

- if the string is empty it will return an empty list
- if it contains only one characters it must return a

# Solving english ruler problem using recursion in python and swift

We must print an english ruler using recursion . An english ruler is ruler where each unit has a number of tick. a unit can be divided into smaller units at 1/2 the interval 1/4 the interval 1/8 the interval … Read More

# what is a byte ?

## what is a byte ?

A byte is 8 bits ,

[_ _ _ _ _ _ _ _ ] 7 6 5 4 3 2 1 0 number of bits = 7 - 0 + 1 = 8

A … Read More