Off topic:How do i merge read counts and gene names of individual files into a single data frame?

Question

[sambhav2mishra]

Suppose i have 2 individual files in excel format containing gene names and read count:

FILE-1

gene_Names   read_count_1
abc                       2
def                        1
ghi                         2
jkl                          3
mno                      1

FILE-2

gene_Names   read_count_2
abc1                       1
def                          2
ghi3                        2
jkl                           4
mno                       1

How do i filter common gene names with corresponding read counts and merge it in one data frame in R language?

gene_Names   read_count_1   read_count_2
def                             1                       2
jkl                               2                       4
mno                           1                        1