sayOnce <- function(value) {
    s <- as.character(value)
    print(paste("Hello, World.",s,sep = " "))
}

say <- function() {
    for(i in 0:9) {
        sayOnce(i)
    }
}

say()

R version 3.6.1 (2019-07-05) -- "Action of the Toes"
Copyright (C) 2019 The R Foundation for Statistical Computing
Platform: x86_64--netbsd (64-bit)

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> sayOnce <- function(value) {
+     s <- as.character(value)
+     print(paste("Hello, World.",s,sep = " "))
+ }
> 
> say <- function() {
+     for(i in 0:9) {
+         sayOnce(i)
+     }
+ }
> 
> say()
[1] "Hello, World. 0"
[1] "Hello, World. 1"
[1] "Hello, World. 2"
[1] "Hello, World. 3"
[1] "Hello, World. 4"
[1] "Hello, World. 5"
[1] "Hello, World. 6"
[1] "Hello, World. 7"
[1] "Hello, World. 8"
[1] "Hello, World. 9"
>