bash how to check file exists code example

Example 1: check if file exists bash

FILE=/etc/resolv.conf
if [ -f "$FILE" ]; then
    echo "$FILE exists."
else 
    echo "$FILE does not exist."
fi

Example 2: zsh check if file exists

FILE=/etc/resolv.conf
if [[ -f "$FILE" ]]; then
    echo "$FILE exists."
fi