Ошибка синтаксиса ожидается операнд error token is - Ремонт и установка крупной бытовой техники

I’m writing a script in bash and I get this error:

./P4.1: line 10: +: syntax error: operand expected (error token is "+")

And this is my code:

#!/bin/bash
read string
echo $string >| temp
num1= cut -d" " -f1 temp
num2= cut -d" " -f2 temp
num3= cut -d" " -f3 temp
while [ $num1 -gt $num3 ]
do
        echo $num1
        num1=$[$num1+$num2]
done

What’s wrong and how do I fix it?
Thanks.

asked Nov 24, 2013 at 16:03

Combination of ceving and Tomek’s:

#!/bin/bash
read num1 num2 num3
while [ $num1 -lt $num3 ]
do
    echo $num1
    num1=$((num1+num2))
done

answered Nov 24, 2013 at 16:32

Blue IceBlue Ice

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Use round parenthesis for numeric computations:

num1=$((num1 + num2))

BoltClock

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answered Nov 24, 2013 at 16:10

cevingceving

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#!/bin/bash
read string
echo "${string}" >| temp
num1= cut -d" " -f1 temp
num2= cut -d" " -f2 temp
num3= cut -d" " -f3 temp
while [ "${num1}" -gt "${num3}" ]
do
    echo "${num1}"
    num1=$(expr "${num1}" + 1)
done

also, quote and brace your variables.

answered Nov 24, 2013 at 16:09

petrus4petrus4

6164 silver badges7 bronze badges

try
num1=$[ num1 + num2 ]
may remove the error ~

answered Jun 30, 2022 at 1:49

Источник

I’m writing a script in bash and I get this error:

./P4.1: line 10: +: syntax error: operand expected (error token is "+")

And this is my code:

#!/bin/bash
read string
echo $string >| temp
num1= cut -d" " -f1 temp
num2= cut -d" " -f2 temp
num3= cut -d" " -f3 temp
while [ $num1 -gt $num3 ]
do
        echo $num1
        num1=$[$num1+$num2]
done

What’s wrong and how do I fix it?
Thanks.

asked Nov 24, 2013 at 16:03

Combination of ceving and Tomek’s:

#!/bin/bash
read num1 num2 num3
while [ $num1 -lt $num3 ]
do
    echo $num1
    num1=$((num1+num2))
done

answered Nov 24, 2013 at 16:32

Blue IceBlue Ice

7,8826 gold badges32 silver badges52 bronze badges

Use round parenthesis for numeric computations:

num1=$((num1 + num2))

BoltClock

697k160 gold badges1387 silver badges1353 bronze badges

answered Nov 24, 2013 at 16:10

cevingceving

21.7k13 gold badges102 silver badges177 bronze badges

#!/bin/bash
read string
echo "${string}" >| temp
num1= cut -d" " -f1 temp
num2= cut -d" " -f2 temp
num3= cut -d" " -f3 temp
while [ "${num1}" -gt "${num3}" ]
do
    echo "${num1}"
    num1=$(expr "${num1}" + 1)
done

also, quote and brace your variables.

answered Nov 24, 2013 at 16:09

petrus4petrus4

6164 silver badges7 bronze badges

try
num1=$[ num1 + num2 ]
may remove the error ~

answered Jun 30, 2022 at 1:49

Источник

The error message is caused by the line a=$(($ex / $f)), because there is no operand following the / (divide) operator. So the immediate suspicion is that the variable f is an empty string.

The cause of that is the behaviour of the $( ) command substitution when f is assigned. This collects the contents of stdout when the enclosed command pipeline is executed. As your factorial() function writes nothing to stdout, the value assigned to f is empty. The solution is to echo or print the value, in place of the return — e.g. as printf '%sn' "${fact}".

Some additional notes that might be helpful:

The value in the return statement represents the status of the function, not any data it may have produced. In the absence of a return statement, the exit status of the last command executed in the function is passed back to the caller.

The return status is truncated to 8 bits, and is unsigned, so it can only take the range 0-255.

In addition, the status of external commands has further conventions. Processes terminated by a signal get a status of 128 + the signal number. If the shell fails to create a new process, or to execute the command, 126 or 127 may be returned. Status 0 is conventionally success, and any small integer from 1 up indicates a command-detected error or unusual result. I would consider it wise to follow the same conventions in my shell functions, and never to return a data value this way.

Shell arithmetic is (according to the GNU/bash manual) evaluated in fixed-width integers. On my system, that appears to be 64-bit signed integers, but it may vary across systems and distros. 31 bits is only sufficient to hold 12!, and 63 bits only holds 20!, which may limit your scope.

This fragment shows Bash arithmetic overflowing 63 bits, somewhere around 9.22e+18.

Paul--) for k in {1..10}; do
> printf '%s %sn' $k $(( 3000000000000000000 * k ))
> done
1 3000000000000000000
2 6000000000000000000
3 9000000000000000000
4 -6446744073709551616
5 -3446744073709551616
6 -446744073709551616
7 2553255926290448384
8 5553255926290448384
9 8553255926290448384
10 -6893488147419103232
Paul--)

My go-to for large numbers is the dc command, which does unconstrained numeric size, but requires RPN (reverse polish notation). This fragment generates the RPN commands to list factorials up to 10!

Paul--) { echo 1; seq -s ' p * p ' 2 10; echo ' p * p q'; }
1
2 p * p 3 p * p 4 p * p 5 p * p 6 p * p 7 p * p 8 p * p 9 p * p 10
 p * p q
Paul--)

and this is the execution (but I tested up to 400!):

Paul--) { echo 1; seq -s ' p * p ' 2 10; echo ' p * p q'; } | dc
2
2
3
6
4
24
5
120
6
720
7
5040
8
40320
9
362880
10
3628800
Paul--)

Источник

I am getting this error bellow:

Path to the shell file:line 6: ++++: syntax error: operand expected (error token is "+")

and

Path to the shell file:line 13: ((: i <= : syntax error: operand expected (error token is "<= ")

This is my script:

#!/bin/bash  
SCRIPTPATH=$( cd $(dirname $0) ; pwd -P )
file="$SCRIPTPATH/android/sdcard.img"
file2="$SCRIPTPATH/android/devices.txt"

TOTALDEVICES=$(($1+$2+$3+$4+$5))
ANDROID4=0
ANDROID5=0
ANDROID5_1=0
ANDROID6=0
ANDROID7=0
echo $TOTALDEVICES
for ((i = 1; i <= $TOTALDEVICES; i++));

do
   if (($1 > 0 && $ANDROID4 < $1)) 
   then 
   echo "Device$i PACKAGE(avd4.4) 1"
   ANDROID4=$((ANDROID4 + 1))
    echo "no" |~/Android/Sdk/tools/bin/avdmanager create avd -f --package 'system-images;android-19;google_apis;armeabi-v7a' --name "avd4"  --tag 'google_apis' -p $SCRIPTPATH/android/avd4
   fi

   if (($2 > 0 && $ANDROID5 < $2 && $ANDROID4 == $1 && $i > $ANDROID4))
   then 
   echo "Device$i PACKAGE(avd5.0) 2"
   ANDROID5=$((ANDROID5 + 1))
    echo "no" |~/Android/Sdk/tools/bin/avdmanager create avd -f --package 'system-images;android-21;google_apis;armeabi-v7a' --name "avd5"  --tag 'google_apis' -p $SCRIPTPATH/android/avd5
   fi
   if (($3 > 0 && $ANDROID5_1 < $3 && $ANDROID5 == $2 && $i > $ANDROID5 + $ANDROID4))
   then 
   echo "Device$i PACKAGE(avd5.1) 3"
   ANDROID5_1=$((ANDROID5_1 + 1))
    echo "no" |~/Android/Sdk/tools/bin/avdmanager create avd -f --package 'system-images;android-22;google_apis;x86' --name "avd5.1"  --tag 'google_apis' -p $SCRIPTPATH/android/avd5.1
   fi
   if (($4 > 0 && $ANDROID6 < $4 && $ANDROID5_1 == $3 && $i > $ANDROID5_1 + $ANDROID5 + $ANDROID4))
   then 
   echo "Device$i PACKAGE(avd6) 4"
   ANDROID6=$((ANDROID6 + 1))
   echo "no" | ~/Android/Sdk/tools/bin/avdmanager create avd -f --package 'system-images;android-23;google_apis;x86' --name "avd6"  --tag 'google_apis' -p $SCRIPTPATH/android/avd6
   fi
   if (($5 > 0 && $ANDROID7 < $5 && $ANDROID6 == $4 && $i > $ANDROID6 + $ANDROID5_1 + $ANDROID5 + $ANDROID4))
   then 
   echo "Device$i PACKAGE(avd7) 5"
   ANDROID7=$((ANDROID7 + 1))
   echo "no" | ~/Android/Sdk/tools/bin/avdmanager create avd -f --package 'system-images;android-24;google_apis;x86' --name "avd7"  --tag 'google_apis' -p $SCRIPTPATH/android/avd7  
   fi
done

AVDMANAGEROUTPUT=$(~/Android/Sdk/tools/bin/avdmanager list avds | grep "Name:")
AVDMANAGEROUTPUT=${AVDMANAGEROUTPUT//$'n'/} # Remove all newlines.
AVDMANAGEROUTPUT=${AVDMANAGEROUTPUT%$'n'}   # Remove a trailing newline.
DEVICES=()
i=0
IFS=' ' read -r -a array <<< "$AVDMANAGEROUTPUT"
for index in "${!array[@]}"
do
    rem=$(( $index % 2 )) #check for odd number to avoid Name:
    if [ $rem -eq 1 ]
    then
        echo "${array[index]}" #Now put values into an array
        DEVICES[$i]=`echo @"${array[index]}"`
        i=$((i+1))
    fi
done
# Check if the sdcard is available
if [ -f "$file" ]
then
    echo "$file found."
    ~/Android/Sdk/emulator/emulator ${DEVICES[0]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[1]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[2]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[3]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[4]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    sleep 110
else
# if there is none,here we are creating one
    echo "$file not found."
    ~/Android/Sdk/emulator/mksdcard 10G "$SCRIPTPATH/android/sdcard.img"
    sleep 5
    ~/Android/Sdk/emulator/emulator ${DEVICES[0]} -sdcard $file  >> "$SCRIPTPATH/emulators.txt" 2>&1 &  
    ~/Android/Sdk/emulator/emulator ${DEVICES[1]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[2]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[3]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    ~/Android/Sdk/emulator/emulator ${DEVICES[4]} -sdcard $file >> "$SCRIPTPATH/emulators.txt" 2>&1 & #open the emulator
    sleep 110
fi

Zanna♦

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asked May 4, 2017 at 6:41

Line 6 of your script expects arguments 1 to 5 to exist. If you run your script with no arguments $1+$2+$3+$4+$5 will become +++++ which explains the error message. (A similar explanation is valid for the second error message.) Perhaps you should check that 5 arguments have been provided and exit with an error message if this test fails, e. g.:

if [ $# != 5 ]
then
    echo "Usage: scriptname num1 num2 num3 num4 num5"
    exit 2
fi

Alternatively you can provide a default value for missing arguments with Bash’s parameter expansion. In the following expression the first 5 command-line arguments, or 0 in their absence, are added to a sum:

$((${1-0} + ${2-0} + ${3-0} + ${4-0} + ${5-0}))

Note that you should also check that each of the 5 arguments is numeric before attempting to obtain their sum.

answered May 4, 2017 at 9:00

Thank you for your answer, you helped me see what I did wrong.

How did I fix it:

I then ran the sh file like ‘file.sh’ 1 1 1 1 1 which had enabled the emulators to run. The 1s determine how many emulators of each do I want to run.

answered May 9, 2017 at 13:51

Источник

Здравствуйте!

Есть скрипт:

#!/bin/bash

echo "Введите своё имя:"

read user_name

let count = `grep $user_name /etc/passwd | wc -l`

if [ $count -gt 0 ];
	then
		echo "В файле /etc/passwd найдено $count совпадений!"
	else
		echo "Нет совпадений!"
fi

Ругается:
./scrypt.sh: line 7: let: =: syntax error: operand expected (error token is «=»)
./scrypt.sh: line 9: [: -gt: unary operator expected

В чем проблема?

Вопрос задан

более трёх лет назад
4039 просмотров

У вас пробел между count между = и между собственно присваиваемым значением, в результате count пустой.
И в операторе тест у вас [ $count -gt 0] при пустой переменной $count расшифровывается как [ -gt 0 ], о чем и сообщает ошибка синтаксиса.
При использовании оператора test, всегда берите переменные в кавычки, то есть
[ «$count» -gt 0 ] или используйте продвинутый test — [[ $count -gt 0 ]], что еще лучше.
Внимательнее с пробелами — где они нужны и где не нужны.

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