Coding standard for:

C++
C#
Java
Python
Rust
R
JavaScript
Scala

Style Guide of Common Languages

R is a high-level programming language used primarily for statistical computing and graphics. The goal of the R Programming Style Guide is to make our R code easier to read, share, and verify. The rules below were designed in collaboration with the entire R user community at Google.

## File Names
File names should end in `.R` and, of course, be meaningful. 


# GOOD
predict_ad_revenue.R 

# BAD 
foo # no extension
foo.R # meaningless name

## Identifiers
Don't use *underscores* ( `_` ) or *hyphens* ( `-` ) in identifiers. Identifiers should be named according to the following conventions. 

### Variable names
The preferred form for variable names is all lower case letters and words separated with dots for example, `variable.name`, but `variableName` is also accepted.




# GOOD
avg.clicks 

# OK 
avgClicks 

#BAD
avg_Clicks

### Function Names
Function names should be *CamelCase*. Use Capitalization of the first letter to separate words within a name, for example, `FunctionName`.
  * Make function names verbs. 


# GOOD 
CalculateAvgClicks 

# BAD
calculate_avg_clicks # use of underscores
calculateAvgClicks  # first letter is lower case

### Constant Names
Constants are named like functions but with an initial `k`, for example, `kConstantName`. 

R is a high-level programming language used primarily for statistical computing and graphics. The goal of the R Programming Style Guide is to make our R code easier to read, share, and verify. The rules below were designed in collaboration with the entire R user community at Google.

# File Names
File names should end in `.R` and, of course, be meaningful. 


# Identifiers
Don't use *underscores* ( `_` ) or *hyphens* ( `-` ) in identifiers. Identifiers should be named according to the following conventions. 

## Variable names
The preferred form for variable names is all lower case letters and words separated with dots for example, `variable.name`, but `variableName` is also accepted.




## Function Names
Function names should be *CamelCase*. Use Capitalization of the first letter to separate words within a name, for example, `FunctionName`.
  * Make function names verbs. 


## Constant Names
Constants are named like functions but with an initial `k`, for example, `kConstantName`. 

In this lesson we will learn naming convention in R.

Naming Conventions

File Names

Identifiers

Variable names

Function Names

Constant Names