The **`debug()` method** in R allows the user to debug a function, line by line, upon its execution. 
# Parameters
The name of the function that needs to be debugged is the parameter in `debug()`. 
# Usage
Right before the function call, the `debug()` method is used. On the execution of the program, the `debug()` method continues to print the values of the variables in the function, line by line. It can also produce graphs of the results of the code. 





There are a few actions that can be done once the `debug()` method, as listed below.

- Type ‘c’ to make the `debug()` function continue till the end of the code section
- Type ‘Q’ to quit the debugging
- Type ‘where’ to show the point where the user is in the call stack of the function

# Code
Here, the `debug()` method calls the `fun()` function defined by the user. It tests the execution on the assigned parameters of `fun()` and runs the code each line at a time. 





fun <- function(value1,value2){
  subval <- value2 - value1
  square <- subval^2
  get <- sum(square)
  get
}

set.seed(100)
value2 <- rnorm(100)
debug(fun)
fun(1,value2)

What is debug() in R?


The debug() method in R enables line-by-line function debugging, showing variable values, and supporting commands like 'c' for continue and 'Q' to quit.