Someone please help me with for functions and histogram

I am doing an assignment where I need to create a histogram. That is no problem and I have been able to do this for the whole data set. I can not get it to do it for each year whatever I try.

(c) For every year from 2008 to 2011 plot a histogram as well as a bar graph of gdp per capita using a “for”-loop.

I know this isn't correct but this is my most recent attempt:
for (combined$year in 2008) {
main="Histogram of GDP per capita",
xlab="GDP per Capita",

My dataset is called combined

Check the documentation for "for-loops", the general syntax is for (variable in vector), see this example.

for (i in unique(iris$Species)) {
    hist(iris[iris$Species == i,]$Sepal.Length,
         main= paste("Histogram of", i, "sepal length"),
         xlab="Sepal Length")

Created on 2019-11-23 by the reprex package (v0.3.0.9000)


You are a legend, i got it to work now. Thank you so much

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