how to increment all digits in string(Bash Script)

Question

My code

#!/bin/bash
echo -n "Zadaj vetu: "
read str
echo $str | awk '{ for (i=NF; i>1; i--) printf("%s ",$i); print $1; }' | tr ' ' '\n' | tr -d '#' | tr -d '=' | tr -d '-'

I need help, I don't understand how to make all the digits in the string that we thought to increase by one. (If there are 9 we should do 0)

example: He11o my name 3s Artem 2029 --> He22o my name 4s Artem 3130

The for loop is processing each field, not each character. — Barmar
– Barmar, Commented Apr 7, 2022 at 20:27
What is the tr ' ' '\n' | tr -d '#' | tr -d '=' | tr -d '-' for? — Ed Morton
– Ed Morton, Commented Apr 7, 2022 at 22:28

Barmar · Accepted Answer · 2022-04-07 20:41:38Z

4

you can use the tr command for this.

echo "$str" | tr '0-9' '1-90' | tr -d '#='

Each character in the first argument is mapped to the corresponding character in the second argument. And it automatically expands ranges of characters, so this is short for tr 012456789 1234567890

answered Apr 7, 2022 at 20:41

Barmar

789k57 gold badges555 silver badges669 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

choroba · Accepted Answer · 2022-04-07 20:34:47Z

1

Perl to the rescue!

echo 'He11o my name 3s Artem 2029' | perl -pe 's/([0-9])/($1 + 1) % 10/ge'

s/PATTERN/REPLACEMNT/ is substitution;
the /g makes "global", it replaces all occurrences;
the /e interprets the replacement as code and runs it;
the % is the modulo operator, it will make 0 from 10.

answered Apr 7, 2022 at 20:34

choroba

245k27 gold badges221 silver badges304 bronze badges

1 Comment

Wuju Style Over a year ago

thank you very much, the program has finally worked properly.

Collectives™ on Stack Overflow

how to increment all digits in string(Bash Script)

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related