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Multiple If statements in bash problem

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# 1  
Old 10-18-2011
Multiple If statements in bash problem
Hi everyone,

May you help me with the correct syntax of the follow bash statements please
Code:
X=10
if [[ "$X" <= 5 ]]; then
    echo "The value is between 1 and 5"
    for ((i=1;i<=${X})); do
     echo $i
    done 
else if [[ "$X" > "5" && "$X"<= 10 ]]; then
    echo "The value is between 6 and 10"
    for ((i=1;i<=${X})); do
     echo $i
    done 
else if [[  "$X" > 10 )) &&  "$X" <= 20]; then
    echo "The value is between 10 and 20"
    for ((i=1;i<=${X})); do
     echo $i
    done 
fi

Thank in advance
# 2  
Old 10-18-2011
You have not mentioned the error messages.
At the first look,

for integer values comparison, You should you -lt type syntax.

Code:
-lt => less than
-le => less than or equal
-gt => greater than
-ge => greater than or equal
-eq => equal
-ne => not equal


There must be a white space on both side of comparison operator and square brackets.

e.g

Code:
[ "$X" <= 20] #invalid
["$X" <= 20 ] # invalid
[ "$X"-le 20] # invalid
[ "$X" -le 20 ] #valid

Last edited by clx; 10-18-2011 at 06:53 AM..
# 3  
Old 10-18-2011
Hi anchal_kare,

I receive syntax errors. I've tried both ways, like in my first post and using comparison operators as you suggest me.
Code:
X=10
if [[ "$X" -le 5 ]]; then
    echo "The value is between 1 and 5"
    for ((i=1;i<=${X})); do
     echo $i
    done 
else if [[ "$X" -gt 5 && "$X" -le 10 ]]; then
    echo "The value is between 6 and 10"
    for ((i=1;i<=${X})); do
     echo $i
    done 
else if [[  "$X" -gt 10 &&  "$X" -le 20 ]]; then
    echo "The value is between 10 and 20"
    for ((i=1;i<=${X})); do
     echo $i
    done 
fi

But I continue receiving syntax errors
-syntax error near of unexpected element "fi"
- it requires an arithmetic expression
- syntax error near of ";"

Thanks for your help
# 4  
Old 10-18-2011
And the error is that X is 10, and loop won't run since X never changes.

You have also loop errors
Code:
for ((i=1;i<=${X}));

Should be i guess
Code:
 for ((i=1;i<=${X}; i++));

Also a syntax error:
Code:
else if [[  "$X" > 10 ))

Guessing it should be
Code:
else if [ $X -gt 10 ] ..

# 5  
Old 10-18-2011
else if should be elif
This User Gave Thanks to itkamaraj For This Post:
Ophiuchus
# 6  
Old 10-18-2011
Quote:
Originally Posted by itkamaraj
else if should be elif
Thanks itkamaraj,

Even when I had some other errors, that's was the main problem.

The correct syntax as I want is:
Code:
X=17
if (( "$X" <= 5 )); then
    echo "The value is between 1 and 5"
    for ((i=1;i<=${X};i++)); do
     echo $i
    done 
elif (( "$X" > 5 )) && (( "$X" <= 10 )); then
    echo "The value is between 6 and 10"
    for ((i=1;i<=${X};i++)); do
     echo $i
    done 
elif (( "$X" > 10 &&  "$X" <= 20 )); then
    echo "The value is between 10 and 20"
    for ((i=1;i<=${X};i++)); do
     echo $i
    done 
fi

Thanks again to all for your help.

Regards
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