"Sharing knowledge is the most fundamental act of friendship. Because it is a way you can give something without losing something." | Shalu Anand

"Sharing knowledge is the most fundamental act of friendship. Because it is a way you can give something without losing something."

with this,

𝗟𝗲𝘁'𝘀 𝗕𝗲𝗴𝗶𝗻 𝐰𝐢𝐭𝐡 𝐃𝐚𝐲 3 :

𝚜𝚎𝚛𝚒𝚎𝚜 𝚘𝚏 𝚜𝚑𝚊𝚛𝚒𝚗𝚐 𝚖𝚢 𝚔𝚗𝚘𝚠𝚕𝚎𝚍𝚐𝚎 𝚘𝚏 𝚝𝚑𝚎 𝙲 𝙻𝚊𝚗𝚐𝚞𝚊𝚐𝚎.

➡𝐂𝐨𝐦𝐦𝐞𝐧𝐭𝐬

Comments are used to indicate something to the person reading the code.

➡1) /* */ 𝐝𝐞𝐥𝐢𝐦𝐢𝐭𝐞𝐝 𝐜𝐨𝐦𝐦𝐞𝐧𝐭𝐬

A comment starts with a forward slash followed immediately by an asterisk (/*), and ends as soon as an asterisk immediately followed by a forward slash (*/) is encountered. Everything in between these character combinations is a comment and is treated as a blank (basically ignored) by the compiler.

/* this is a comment */

➡The comment above is a single-line comment. Comments of this /* type can span multiple lines, like so:

/* this is a

multi-line comment */

Though it is not strictly necessary, a standard style convention with multi-line comments is to put leading spaces and asterisks on the lines subsequent to the first, and the /* and */ on new lines, such that they all line up:

/*

* This is a

* multi-line Comment

*/

The extra asterisks do not have any functional effect on the comment as none have a related forward slash.

These /* type of comments can be used on their own line, at the end of a code line, or even within lines of code:

/* this comment is on its own line */

if (x && y) { /*this comment is at the end of a line */

if ((complexCondition1) /* this comment is within a line of code */

&& (complexCondition2)) {

/* this comment is within an if, on its own line */

}

}

➡Comments cannot be nested. This is because any subsequent /* will be ignored (as part of the comment) and the first */ reached will be treated as ending the comment. The comment in the following example will not work:

/* outer comment, means this is ignored => /* attempted inner comment */ <= ends the comment, not this one => */

➡2) // 𝐝𝐞𝐥𝐢𝐦𝐢𝐭𝐞𝐝 𝐜𝐨𝐦𝐦𝐞𝐧𝐭𝐬

C99 introduced the use of C++-style single-line comments. This type of comment starts with two forward slashes and runs to the end of a line:

// this is a comment

This type of comment does not allow multi-line comments, though it is possible to make a comment block by adding several single-line comments one after the other:

// each of these lines are a single-line comment

// note how each must start with

// the double forward-slash

➡This type of comment may be used on its own line or at the end of a code line. However, because they run to the end of the line, they may not be used within a code line

// this comment is on its own line

if (x && y) { // this comment is at the end of a line

// this comment is within an if, on its own line

}