Tag Archives: #mastery09

Hello everybody:

For my mastery 09 I created a PDF tutorial to explain what a variable is and the basic types of variables we can use in C++. I really hope you find it useful.

Here´s the link https://drive.google.com/file/d/0B5CZIHLkZcDzUFpFbFAxMUhlR28/view?usp=sharing

#TC1017 #Mastery09

#TC1014  #mastery09

there are different types of way that we can store data. In python the  most basic data are numbers and strings.

*First in the numbers we have the integers numbers and float numbers.

-Integers numbers are conformed for all the numbers that are in the range of negative infinity to infinity, e.g., -1, 0, 1, etc.

-Float numbers are  all the numbers that has digits afters their decimal point. For example: 3.3,4.66,5.9, etc.

*Second the strings can be numbers,letters and any others characters, but all of this characters has a simple sintax, if you want to write strings in a code, you has two option:

1)with double quotes example -> x=”hola mundo”

2)with only one quote example -> x= ‘hola mundo’

Data-types are different types of ways we can store data. The most basic Data-types are the numbers (which we can divide in integers and Floating point numbers) and strings.

Numbers:

>>>An integer is a whole number form the range of negative infinity to infinity, e.g., -5, 0, 17, etc.

>>>A floating point number is any number that has digits after a decimal point, e.g., 2.4, 132.8441, 3.333, etc.

Strings:

A string is a piece of text that can be a set of letters, numbers or other characters. To include a string in our program, we have to sorround it with quotes or double quotes. e.g.:

>>> x= “This is a string with double quotes”

>>> y= ‘This is a string with simple quotes’

And the work exactly the same.

There are some more complex Data-types such lists, tuples and dictionaries.

Lists:

A list stores a bunch of values and keeps them in order for the user; the user can add, delete or modify any item from the list whenever he wants. A list doesnt have a fixed number of values, the user can modify it as he wants. Lists are characterized because of the square brackets. For example:

x=[1,2,3,4,5]

Tuples:

Tuples are a lot like lists but the do have a fixed number of values that can not be modified. Different from lists, tuples are defined with parentheses instead of square brackets. For example:

x=(1,2,3,4,5)

Dictionaries:

Dictionaries contain a key and a value, so ypu can look up for the value later using the key. We can use dictionaries to build complex nested data structures or just to store values. The syntax is the following:

x={‘key1’: ‘value1’, ‘key2’: ‘value2’}

You can learn more about data-types in here: http://www.voidspace.org.uk/python/articles/python_datatypes.shtml

#TC1014 #mastery09

#mastery09 #TC1017

Compilers reserve certain terms or keywords (keywords) for the syntactic language use, such as: asm, auto, break, case, char, do, for, etc. While these words are defined for ANSI C, different compilers extend this definition to other terms.

To create a variable in a particular place of a program first write the variable and then the identifier with which we name the variable, followed all a ‘;’. This is referred to define a variable. The general definition is:

For example:

int number; / * Create the variable number of type integer * /

char letter; / * Create the letter variable, character type * /

float a, b; / * Create two variables a and b, of floating point number * /

Dentro del lenguaje de c++ existen varios types los mas usados son los tipo char, int, float y double.

El uso de los tipo char es para números pequeños y caracteres de PC.

El uso de los tipo int se usa para números entre el rango: -2,147,483,648 <= X <= 2,147,483,647.

Para saber que tipo de variable debemos usar tenemos que tener en cuenta el tipo de datos que estaremos manejando, para elegir la más conveniente.

Para mayor información puede checarse el siguiente enlace:

http://www.zator.com/Cpp/E2_2_4.htm

#Mastery09  #TC1017