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Changed the file to reflect standards (#27542)

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* Changed the file to reflect standards

`goto` is generally discouraged for use in C++, which wasn't what this was saying. Dijkstra even [said](http://www.u.arizona.edu/~rubinson/copyright_violations/Go_To_Considered_Harmful.html), "The go to statement as it stands is just too primitive; it is too much an invitation to make a mess of one's program." in 1968. This file seemed to indicate the opposite.

* fix: fixed grammar
This commit is contained in:
Nischay Hegde
2019-06-25 03:54:30 +05:30
committed by Randell Dawson
parent ae33d5888f
commit 321ee3e69d
1 changed files with 21 additions and 9 deletions
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30
guide/english/cplusplus/goto/index.md
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@ -1,10 +1,10 @@
--- ---
title: goto as a powerful utility title: goto
--- ---
# Intro to the use of goto and labels # Intro to the use of goto and labels
goto is one of the most powerful, yet highly underrated piece of logic in C++. Crazy amount of optimization can be achieved using goto, provided it is used properly. goto is one of the most powerful pieces of logic in C/C++. Crazy amounts of optimization can be achieved using goto, provided it is used properly. **It is, however, discouraged for use in C++, since better ways of programming exist, and it [leads to spaghetti code](https://stackoverflow.com/questions/3517726/what-is-wrong-with-using-goto#3517746)**
It does exactly what it is named as. It goes to the mentioned occurence of the next label, wherever may it be. It does exactly what it is named as. It goes to the mentioned occurence of the next label, wherever may it be.
# Terminology # Terminology
@ -13,14 +13,26 @@ It does exactly what it is named as. It goes to the mentioned occurence of the n
label - this can be named anything. label - this can be named anything.
# syntax # syntax
goto <label>; `goto label; //This takes the program flow to the next appearance of label.`
(without the <> );
//This takes the exe to the next appearance of label.
goto is something that transcends all loops. To be clearer on this point, here is an example. goto is something that transcends all loops. To be clearer on this point, here is an example.
https://code.sololearn.com/cI4qqQA8W2q3 ```
#include <iostream>
using std::cout;
However, care must be taken to use goto very carefully, especially in the early days of coding as it can lead to crazy issues, if not understood well enough. int main() {
for(;;)
{
if(1)
goto label;
}
label:
cout << "lol"; //here, goto is used to get out of an otherwise infinite loop. That is one of the only places where goto is tolerated.
return 0;
}
```
[Try the code here!](https://wandbox.org/permlink/tG0aInbyuKJQC4ER)
**However, care must be taken to use goto very carefully.**