Hi folks!

I hope you enjoyed the “Welcome” lesson which tried to answer the very basic questions; what MQL4 is, why MQL4 and where (to write) MQL4?

Always the biggest and the most important question(s) are how, and the entire coming lessons are the answer.

Now, I want you to empty your mind from any confusion and read carefully the next few concepts.

We are talking today about the SYNTAX rules of MQL4.
And as I told you before, If you are programming in C (or its superset C++) then you know a lot of MQL4 before even I start my lessons.
That’s because the syntax of MQL4 is very like of the syntax of C.

The dictionary means of the word SYNTAX of a programming language is:
“The set of allowed reserved words and their parameters and the correct word order in the expression is called the syntax of language”. “Wikipedia”

So, when we are studying the syntax of the language we are studying its grammar and writing rules which consist of:

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Why don't you download the lesson and read more?

See u
Coders' Guru

Attached Images

Lesson2.pdf (68.8 KB, 4791 views)

Hi folks,

I'm not writing my lessons on Firday, I just came to ask you if there are any questions?

Did you find the SYNTAX lesson an easy lesson? do you have any suggestions?

__________________
Hope it helps !
Coders' Guru
Senior MQL programmer:
www.xpworx.com/custom.htm

Thanks a lot for the lessons.
I am your student as well.

Thank you for this work and for your knowledge

Question 1

SYNTAX in MQL4 is the studying of its grammar and writing rules which consist of

1-
2-
3-
4-

………………………………………………………………………………………………

Question 2

Which sentences of the following are false, and why?

1- When you write your code, you can freely use any set of spaces, tabs and empty lines you want to separate your code and your line of code to make them readable and eyes pleasing.


(true/false)

Why:


2- You can use “//” symbol to comment Multi lines by starts the line with “//” and ends it with “//”.


(true/false)

Why:



3- These keywords are reserved words in MQL4 which you can use them as name for your identifiers:

bool,white,Color,case,break,do and Extern


(true/false)

Why:



………………………………………………………………………………………………

Question 3

Which of the following is a valid code and which is invalid, and why?

1-
extern int /*HELLO! I’m a comment*/ MA_Period=13;

(Valid/Invalid)

Why:


2-
int 3Periods;

(Valid/Invalid)

Why:


3-
string _MyString = “Welcome”;

(Valid/Invalid)

Why:


4-
double
MacdCurrent,
MacdPrevious,
SignalCurrent;

(Valid/Invalid)

Why:


5-
color Color= C'128,128,128';

(Valid/Invalid)

Why:





.

Attached Images

Lesson2Answers.pdf (26.2 KB, 639 views)

__________________
Hope it helps !
Coders' Guru
Senior MQL programmer:
www.xpworx.com/custom.htm

It is more than generous of you to develop this thread and approach....

I greatly appreciate it.....

thank you


dave

dave,

You're welcome!
I hope you enjoy the course.

__________________
Hope it helps !
Coders' Guru
Senior MQL programmer:
www.xpworx.com/custom.htm

I am only on my second lesson and I am quite impressed. This gives both studies and questions.


Thank you very much for sharing your knowlege

__________________
With God All things are Possible