Setting Input field to 2 decimal points (Price)











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0
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I am currently trying to input prices into a .txt file.



So i want it when the user input:1.1



Instead of 1.1, I want it to become 1.10 instead. As it would look better for the table I am trying to make in the future. I would also like to round up or down if it goes more than 3 decimal places. (Thanks john1024 for the correction)






bash floating-point







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  • 1




    Oh... Alright i'll edit my question. Thanks!
    – pandora
    Jan 19 at 3:12






  • 1




    So... read x; printf '%.2fn' "$x" maybe? See help printf and man 3 printf
    – steeldriver
    Jan 19 at 3:22






  • 1




    To store the additional zero in variable x2: read x; printf -v x2 '%.02f' "$x"
    – John1024
    Jan 19 at 3:40






  • 2




    @John1024, that sounds like an answer to me.
    – ilkkachu
    Jan 19 at 9:48






  • 2




    Possible duplicate of AWK with one decimal place
    – αғsнιη
    Jan 20 at 8:44















up vote
0
down vote

favorite












I am currently trying to input prices into a .txt file.



So i want it when the user input:1.1



Instead of 1.1, I want it to become 1.10 instead. As it would look better for the table I am trying to make in the future. I would also like to round up or down if it goes more than 3 decimal places. (Thanks john1024 for the correction)






bash floating-point







share|improve this question




















  • 1




    Oh... Alright i'll edit my question. Thanks!
    – pandora
    Jan 19 at 3:12






  • 1




    So... read x; printf '%.2fn' "$x" maybe? See help printf and man 3 printf
    – steeldriver
    Jan 19 at 3:22






  • 1




    To store the additional zero in variable x2: read x; printf -v x2 '%.02f' "$x"
    – John1024
    Jan 19 at 3:40






  • 2




    @John1024, that sounds like an answer to me.
    – ilkkachu
    Jan 19 at 9:48






  • 2




    Possible duplicate of AWK with one decimal place
    – αғsнιη
    Jan 20 at 8:44













up vote
0
down vote

favorite









up vote
0
down vote

favorite











I am currently trying to input prices into a .txt file.



So i want it when the user input:1.1



Instead of 1.1, I want it to become 1.10 instead. As it would look better for the table I am trying to make in the future. I would also like to round up or down if it goes more than 3 decimal places. (Thanks john1024 for the correction)






bash floating-point







share|improve this question















I am currently trying to input prices into a .txt file.



So i want it when the user input:1.1



Instead of 1.1, I want it to become 1.10 instead. As it would look better for the table I am trying to make in the future. I would also like to round up or down if it goes more than 3 decimal places. (Thanks john1024 for the correction)






bash floating-point




bash floating-point






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited yesterday









Rui F Ribeiro

38.6k1479128




38.6k1479128










asked Jan 19 at 2:56









pandora

35




35








  • 1




    Oh... Alright i'll edit my question. Thanks!
    – pandora
    Jan 19 at 3:12






  • 1




    So... read x; printf '%.2fn' "$x" maybe? See help printf and man 3 printf
    – steeldriver
    Jan 19 at 3:22






  • 1




    To store the additional zero in variable x2: read x; printf -v x2 '%.02f' "$x"
    – John1024
    Jan 19 at 3:40






  • 2




    @John1024, that sounds like an answer to me.
    – ilkkachu
    Jan 19 at 9:48






  • 2




    Possible duplicate of AWK with one decimal place
    – αғsнιη
    Jan 20 at 8:44














  • 1




    Oh... Alright i'll edit my question. Thanks!
    – pandora
    Jan 19 at 3:12






  • 1




    So... read x; printf '%.2fn' "$x" maybe? See help printf and man 3 printf
    – steeldriver
    Jan 19 at 3:22






  • 1




    To store the additional zero in variable x2: read x; printf -v x2 '%.02f' "$x"
    – John1024
    Jan 19 at 3:40






  • 2




    @John1024, that sounds like an answer to me.
    – ilkkachu
    Jan 19 at 9:48






  • 2




    Possible duplicate of AWK with one decimal place
    – αғsнιη
    Jan 20 at 8:44








1




1




Oh... Alright i'll edit my question. Thanks!
– pandora
Jan 19 at 3:12




Oh... Alright i'll edit my question. Thanks!
– pandora
Jan 19 at 3:12




1




1




So... read x; printf '%.2fn' "$x" maybe? See help printf and man 3 printf
– steeldriver
Jan 19 at 3:22




So... read x; printf '%.2fn' "$x" maybe? See help printf and man 3 printf
– steeldriver
Jan 19 at 3:22




1




1




To store the additional zero in variable x2: read x; printf -v x2 '%.02f' "$x"
– John1024
Jan 19 at 3:40




To store the additional zero in variable x2: read x; printf -v x2 '%.02f' "$x"
– John1024
Jan 19 at 3:40




2




2




@John1024, that sounds like an answer to me.
– ilkkachu
Jan 19 at 9:48




@John1024, that sounds like an answer to me.
– ilkkachu
Jan 19 at 9:48




2




2




Possible duplicate of AWK with one decimal place
– αғsнιη
Jan 20 at 8:44




Possible duplicate of AWK with one decimal place
– αғsнιη
Jan 20 at 8:44










1 Answer
1






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To read in a price and coerce it to have 2 decimal places, try:



read -p "Enter the price: " var

printf -v var '%.2f' "$var"


The %.2f format tells printf to use two-decimal digits.



Examples:



$ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"

Enter the price: 1.2

var=1.20

$ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"

Enter the price: 1.123

var=1.12


Note: Bash can format numbers with decimal points but it cannot do addition, subtraction, or other arithmetic on such floating point numbers. For that, you will need other tools like awk or bc or zsh.






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    1 Answer
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    up vote
    0
    down vote













    To read in a price and coerce it to have 2 decimal places, try:



    read -p "Enter the price: " var
    
printf -v var '%.2f' "$var"


    The %.2f format tells printf to use two-decimal digits.



    Examples:



    $ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
    
Enter the price: 1.2
    
var=1.20
    
$ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
    
Enter the price: 1.123
    
var=1.12


    Note: Bash can format numbers with decimal points but it cannot do addition, subtraction, or other arithmetic on such floating point numbers. For that, you will need other tools like awk or bc or zsh.






    share|improve this answer

























      up vote
      0
      down vote













      To read in a price and coerce it to have 2 decimal places, try:



      read -p "Enter the price: " var
      
printf -v var '%.2f' "$var"


      The %.2f format tells printf to use two-decimal digits.



      Examples:



      $ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
      
Enter the price: 1.2
      
var=1.20
      
$ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
      
Enter the price: 1.123
      
var=1.12


      Note: Bash can format numbers with decimal points but it cannot do addition, subtraction, or other arithmetic on such floating point numbers. For that, you will need other tools like awk or bc or zsh.






      share|improve this answer























        up vote
        0
        down vote










        up vote
        0
        down vote









        To read in a price and coerce it to have 2 decimal places, try:



        read -p "Enter the price: " var
        
printf -v var '%.2f' "$var"


        The %.2f format tells printf to use two-decimal digits.



        Examples:



        $ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
        
Enter the price: 1.2
        
var=1.20
        
$ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
        
Enter the price: 1.123
        
var=1.12


        Note: Bash can format numbers with decimal points but it cannot do addition, subtraction, or other arithmetic on such floating point numbers. For that, you will need other tools like awk or bc or zsh.






        share|improve this answer












        To read in a price and coerce it to have 2 decimal places, try:



        read -p "Enter the price: " var
        
printf -v var '%.2f' "$var"


        The %.2f format tells printf to use two-decimal digits.



        Examples:



        $ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
        
Enter the price: 1.2
        
var=1.20
        
$ read -p "Enter the price: " var; printf -v var '%.2f' "$var"; echo "var=$var"
        
Enter the price: 1.123
        
var=1.12


        Note: Bash can format numbers with decimal points but it cannot do addition, subtraction, or other arithmetic on such floating point numbers. For that, you will need other tools like awk or bc or zsh.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Jan 20 at 8:22









        John1024

        45.7k4103118




        45.7k4103118






























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