What is the syntax of "expr" command?

Answers were Sorted based on User's Feedback



What is the syntax of "expr" command?..

Answer / swaroopa

while [ $num -gt 0 ]
do
i=`expr $i \* 10 + $num % 10`
num=`expr $num / 10`
done

Is This Answer Correct ?    35 Yes 10 No

What is the syntax of "expr" command?..

Answer / jayachandran.g.r

it is used to use arithmatic operation in shell scripting

stntx: expr op1 opertor op2

where op1 and op2 may be any integer no(without any
decimalpoint)and operator can be
+ Addition
- Subtraction
/ division
% Modular
\* Multiplication


EX: $expr 1 + 3


o/p 4

Is This Answer Correct ?    31 Yes 18 No

Post New Answer

More Shell Script Interview Questions

What language is bash?

0 Answers  


Write down the syntax for all the loops in shell scripting.

0 Answers  


How will you schedule a job that will run every month last day?(some months have 30 days,some 31 days,28,29 days)

1 Answers   NTT Data, TCS,


Is SSO and SSL support BOXI?

2 Answers  


What is meant by dos operating system?

0 Answers  


What are the different shells available?

3 Answers  


Shifting positional parameter in Linux fedora core ? Hi I have written following shell script for display value of positional. But in 11th and 12 field will display without shifting command. May I know is it advance of Linux of programming code error? #!/usr/bin/bash echo "Bellow is the out of ps command" echo "`ps`" echo "The passing Parameter i.e output of \$1,2... value is:==> $11 " echo "Total number of passed argument \$# is:==> $#" echo "Passed argument names (\$*) are:==>$*" echo "This script PID(\$$) is :=>$$" echo "The name of executing script(\$0) is :==>$0" echo "The Parent ID of this script(\$PPID) is:==>$PPID" And my input to this script is ./scriptname arg1 arg2 arg3 arg4 arg5 arg6 arg7 arg8 arg9 arg10 arg11 arg12 Output Is Bellow is the out of ps command PID TTY TIME CMD 2892 pts/0 00:00:00 bash 3172 pts/0 00:00:00 positional_para 3173 pts/0 00:00:00 ps The passing Parameter i.e output of $1,2... value is:==> arg11 Total number of passed argument $# is:==> 13 Passed argument names ($*) are:==>arg1 arg2 arg3 arg4 arg5 arg6 arg7 arg8 arg9 arg10 arg11 arg12 arg13 This script PID($$) is :=>3172 The name of executing script($0) is :==>./positional_parameter The Parent ID of this script($PPID) is:==>2892 After the ps output please see the next line I.e $11 value comes out without shifting the parameter. How is it give me my friends

0 Answers  


How to calculate the number of passed arguments?

0 Answers  


defination of mapfile in winrunner?

0 Answers  


What is the use of "$?" Sign in shell script?

0 Answers  


Write a shell script that adds two numbers if provided as the command line argument and if the two numbers are not entered throws an error message.

0 Answers  


Create a bash shell script that removes all files whose names end with a "~" from your home directory and subdirectories. Name this script "cleanup.sh"

6 Answers  


Categories