I have a column for gender of students. 1 = male 2 = female And I have 50 students. Please, how do I plot a histogram just for the gender in R?

Question

I have a column for gender of students. 1 = male 2 = female And I have 50 students. Please, how do I plot a histogram just for the gender in R? My data are like this; 1,2,1,