Check a specific word whether is in file

Shell Programming and Scripting
1

I want to valid a specific word whether it is contained in the text file. For example:

family.txt
father
mother
son
sister

if ("father" contain in family.txt)
     do some process
else
    do other process

How shell scripting can accomplish this? Anyone can provide helps?

2

Hi dude,

With Regards
Anish Kumar.v

3 
if [[ -n `grep -m 1 'father' family.txt` ]]; then
     # do some process
else
     # do some other process
fi
4

This is what i got

grep: illegal option -- m
Usage: grep -hblcnsviw pattern file . . .

May i know where did i do wrong?