or in if bash code example

Example 1: bash or

if [ "$1" = "a.txt" ] || [ "$2" = "c.txt" ]; then
	# do smt...
fi

Example 2: if and if bash

if [ "${STATUS}" != 200 ] && [ "${STRING}" != "${VALUE}" ]; then

Example 3: bash if

#!/bin/bash

foo="qux"
bar="qux"

if [ "$foo" = "$bar" ]; then
    echo "The strings are equal."
else
    echo "The strings aren't equal."
fi