C:\>perl -e "print \"true\" if 'nanosecond'== 'nanosecond'"

C:\>perl -e "print \"true\" if 'nanosecond'!= 'nanosecond'"
true
C:\>perl -e "print \"true\" if 'informal'== 'formal'"

C:\>perl -e "print \"true\" if 'informal'!= 'formal'"
true
C:\>