C++: Basic Syntax

Name: C++: Basic Syntax
Author: Barbara Hecker

Learn the basic syntax of C++ programming.

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Course: On-Demand

Hello everybody and welcome back to another video. In this video we're going to take a look at data types. Data types are attached to data so that it tells what is actually being stored in terms of the amount of data as well as the format of the data. For all of our variables, functions have data types, variables have data types, and so far we've been introduced to the int data type which is an integer value. The integer value is a whole number like 21 which is our age. We can also have fractions of, for example, dollars or floats. As an example I'm going to take the program that we just wrote for input and I'm going to change it around a little bit so it just says enter a number. What is the number? Actually what is the number and then it'll print out the number is and then it'll print out our number and let's just change our variable name to i because it's no longer age. So that we know in here when we print out a number we print out a single value. So ints hold a single integer value, integer value, I think I will just put that there. If we want a double we use the word double and if you spell it correctly it actually shows up in this sort of this dark blue so I'm going to say double D which prints out decimal. So I'm going to put here I'll just go like this x dot zero zero or there's also float which is another data type and I'm calling these data type these are the variable names so I said to inches your i double D float f I'm just using single character names names. I have to start out with a character they can be a full word they can contain special characters but certain ones are limited it's better to go with something that makes more sense and then when you're creating variables to comment the variables a bit here so that you know what the variable is actually being used for. So this one also holds precision but it holds less accuracy so the float will go out to a lot of decimal places the double will only go down to two for money. So I'm going to have things like characters characters hold a single character we have these are the most common one integer double float and character the most common variable types the variable type basically just says what format the data is going to be in when we use it so for example I'm going to change this now to float and so instead of seeing in the age we're going to see an f and then we're going to print f to the screen and we'll see the difference here so if I run this program that we've just written for a second here it's going to say what is the number I'm going to put a float number and I'm going to put 12.999 and then it's going to say that the number is 12.999 so you see it's a float value if I try to put something else that's not a float value in there for example let me put a character in there what is the number I'm going to put g in there instead it says the number is zero it doesn't know what the number is because the format's incorrect because g is a character not a number but if I change it to our character so I'm going to see and see which is for character which we called our variable character and then I'm going to print out the number is well it's not really a number anymore it's a character but it should work so in here I'm going to put in a and now it says the number is a on the screen so that helps us kind figure out that we need to use the A if I put in the D for example I'm going to take a double value so let's see I build it here run it let's put a double value in here how about a dollar 50 I'm going to put a dollar 50 in there and now I have a one well it's a zero so the zero got truncated off so if I run it again and say let's see 155 145 144 144 that works I see I have a double value that comes in here so you can see where the data type itself is storing the format for the particular data that we're storing so integers doubles floats characters there's a few other ones and you know things longs and shorts which are subcategories of these but these are pretty much the main one there's also a string class that we'll look at in another video that holds multiple characters together but these are your basic data types and you'll use these data types when you're right program except input and store data thanks for watching

Beginner Provider : Barbara Hecker 7 Lessons · 31m in English

Course Description

Basic Syntax

This course will cover how to understand the basic syntax of C++ code. Syntax in code, though only a basic concept, is the most important part of any software program. In order to understand syntax, you will learn the different data types within c++ programming. After a general look, you will look more in depth into specific data types such as variables, constants, arrays, pointers, and finally a look at string classes.

Learning Objectives

Skills

What You'll Learn

Understand the basic syntax of C++ code
Distinguish between the different data types in C++
Use data types including variables, constants, arrays, and pointers
Work with the string class in C++
Create simple data-based programs

Key Takeaways

Syntax, though a basic concept, is the most important part of any software program.
Understanding syntax requires learning the different data types within C++ programming.
The course covers specific data types including variables, constants, arrays, pointers, and string classes.
The course progresses from a general look at data types to a more in-depth examination of specific ones.

Frequently Asked Questions

What does this course cover?

This course covers how to understand the basic syntax of C++ code, including the different data types in C++ such as variables, constants, arrays, pointers, and string classes.

What will I learn in this course?

You will learn basic code syntax, how to distinguish data types, and how to use data types, building skills to create simple data-based programs and understand data types in code.

Which topics or lessons are included?

The lessons include Data Types, Abstract Data Types, Variables, Constants, Arrays, Pointers, and the String Class.

What skills will I gain from this course?

You will gain skills in C and C++ data types, C++ fundamentals and concepts, operators in C and C++, and syntax, enabling you to create simple data-based programs.