How to calculate the body mass in g for the Adelie Penguins species

Hi.
I´m begginer on R.
Have to calculate the body mass in g for the Adelie Penguins species.
I need some help how to write a code to summarize() and mean() functions to find the mean value for the variable (body_mass_g) on penguins dataset.

Your support

The online book R for Data Science (https://r4ds.had.co.nz) by Hadley Wickham and Garret Grolemund is an excellent way to learn R. For this particular problem, I suggest you look at section 5.6.

Here is a non-tidy solution:

library(palmerpenguins)
df <- data.frame(penguins)
df <- df[complete.cases(df),] # delete NA rows

mean(df[df$species=="Adelie",6])
mean(df[df$species=="Chinstrap",6])
mean(df[df$species=="Gentoo",6])
mean(df[,6])