#' Print a dot every k loops
#'
#' @param k looping paramters
#' @param every print a symbol when k mod every == 0, default 100
#' @param symbol String to print, default \code{.}
#' @examples
#' for( k in 1:1000 ){
#' dot(k)
#' dot(k, every=150, symbol="_")
#' }
dot <- function(k, every=100, symbol="."){
if(k %% every == 0){
cat(symbol)
}
}
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