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get number of latin letter in alphabet simple

tolikpunkoff Jun 6th, 2019 63 Never
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  1. #!/bin/bash
  2.  
  3. #get number of latin letter in alphabet
  4. #use nlett <letter>, e.g nlett a
  5.  
  6. SNUM=0
  7. SFND=`echo $1|grep '^[a-z]$'`
  8. if [ -z "$SFND" ]; then
  9.     echo "Error: in first parameter must be one small latin letter!"
  10.     exit 1
  11. fi
  12.  
  13. ALPHABET="abcdefghijklmnopqrstuvwxyz"
  14. SNUM=`expr index $ALPHABET $SFND`
  15.  
  16. echo "$SFND is $SNUM"
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