Why do I keep getting recommended these short scripting tutorials using "clever" mathematics and painfully outdated syntax? As long as we're using bash, zsh, or ksh... ~~~~~~~~~~ while (( num > 0 )); do (( rem = num % 10 )) (( rev = rev * 10 + rem )) (( num = num / 10 )) done if (( rev == n )); then .... ~~~~~~~~~~ 1. [..] is an ancient relic. For arithmetic expressions and tests, use ((..)) instead. It supports actual operators like > (greater than). 2. For string and file tests, use [[..]] instead. It is more versatile and robust. The only time you'll ever need the old [..] test is for posix-level portability. 3. `..` is _extremely_ outdated. Even posix has supported the more robust $(..) form of command substitution for decades. 4. expr is an unnecessary call to an external command. bash can do integer arithmetic internally within ((..)) or $((..)). zsh, ksh also support floating point. 5. A challenge like this can be made more general and flexible as a simple string check. ~~~~~~~~~~ read -r string1 for (( n=1; n<=${#text}; n++ )); do #c-style for loop to reverse the string, character by character. string2+=${string1: -n:1} #returns the nth character from the end of the string. watch the space in front of the -n. done if [[ $string1 == $string2 ]]; then echo "It's a palindrome" else echo "It's not a palindrome" fi #Here's another variation for the loop, running it in the opposite direction: for (( n=${#text}-1; n>=0; n-- )); do text2+=${text1:n:1} done ~~~~~~~~~~ 6. Check out Greg's Wiki, particularly the BashFAQ and BashPItfalls pages, for details. Pay special attention to FAQs #31 and #82, and the ArithmeticExpression page.

Don't use [...] for arithmetic evaluation, use ((..)). Inside them you can use actual math operators, including ((x?y:z)) ternary operations, set variables with =, and use them without $. In fact, don't use [...] at all. All of the advanced shells support the more powerful and flexible [[...]]. And `..` backticks, too? <sigh>. $(..) is the recommended pattern for subshell expansion. expr is also unnecessary, it being just another (and outdated) way to invoke an arithmetic context: Try ((i++)) instead. But a for loop would eliminate it entirely. See BashFAQ #32 and #82, and the page on ArithmeticExpression at Greg's Wiki for details. ~~~~~ declare -i large=$1 min=$1 num # the 'in $@' isn't actually necessary; for loops iterate over input arguments by default, but it can be clearer to read. for num in "$@"; do (( large = num > large ? num : large )) (( min = num < min ? num : min )) done printf 'Largest number is: %d Smallest number is: %d ' "$large" "$min" ~~~~~ In any case, as long as we are talking positive integer values only, we don't need math operations at all. We can use bash's sparse arrays and expansion operators instead. ~~~~~ for n; do nums[n]=$n # set $n as both the index and content of the array elements done # -1 prints the last (highest) array entry, ":0:1" means print one entry, starting from index 0. printf 'Largest number is: %d Smallest number is: %d ' "${nums[-1]}" "${nums[@]:0:1}" ~~~~~ Note1: bash's arithmetic support is integer only. You have to turn to external tools like awk or bc for decimal support. Note2: zsh does have floating point support, but it doesn't have sparse arrays. It does have built-in sorting algorithms, however, so it should be possible to work out something similar.

thanks

Great video! After installing mine, the anaconda navigator do not open?What could be the problem

tq very useful

Thank you sir📚

nice video but i have one question, in may be previous versions and many other tutorials i saw when we click on 'new' there is option of creating python 3 file while in this newer version its not there we have to create a notebook and then select kernal. Do you know y is it so

Is there a good Jupyter tutorial somewhere? This video was excellent.

How can I install Keras and other packages?

This all worked.

If I have a saved Python program then how can I load it into Jupyter and run it instead of typing my Python code line by line?

why is mine not working??

right or wrong ? echo "Enter numbers separated by spaces:" read -a numbers max=${numbers[0]} min=${numbers[0]} for num in "${numbers[@]}"; do if [ "$num" -gt "$max" ]; then max="$num" fi if [ "$num" -lt "$min" ]; then min="$num" fi done echo "Maximum: $max" echo "Minimum: $min"

tqsm brother... i was given a topic to speak on computer application in business and uve just gave me an idea of what I should speak exactly...

I’m having an error that says I can’t use done!

Thanks a lot sir

Nice video... Topic explaination is very simple and to the point.

nice work

value of time great lecture sir g

Kons tutorial is here for you . hope you do understand the tutorials . please make sure to like and subscribe . and also if you can write your opinions here in the comment section

Nice video good good #universalcomputereducation