how to use expr Post: 302273700

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

expr

Hello! I want to evaluate some mathematical expressions in a script and I try to use 'expr' command. Unfortunatally, when I have, for example, expr 8.2 + 6 the result is 'expr: non-numeric argument' Why ? I work on SunOs 5.7. Thanks in advance Nathe

2. Shell Programming and Scripting

expr problem

Hi, in my ksh script expr 22 / 10 results as 2 but the actual result expected in 2.2. how do i get that result. Please help Thanks,

3. Shell Programming and Scripting

getting error with expr

sum=0; cat op_api2 |while read word1 word2; do echo $word2 sum=`expr $word2 + $sum`; done echo $sum op_api2 ( file has this data ) ---------------------------- UsageSummary 1034 UsageSummary 1675 UnbilledUsage 175 UnbilledUsage 177 UnbilledUsage 177 UnbilledUsage 194 I want the...

4. Shell Programming and Scripting

test expr VS [ expr ]

What is the difference between test expr VS . For example : if test 5 -eq 6 echo "Wrong" and if echo "Wrong" bot will give the same output as Wrong. Now, what is the difference between these two? though they are producing the same result why we need two? Any answer will be...

5. Shell Programming and Scripting

expr command help

I'm trying to check if a variable'd string is only one character and use that in an if statement the only way I could find is: $expr "${var}" : . # expr STRING : regrep where the "." is the grep wildcard for any single character. Whats wrong with my code here and is there a...

6. Shell Programming and Scripting

the expr \*

$ cat > mtable #!/bin/sh # #Script to test for loop # # if then echo "Error - Number missing form command line argument" echo "Syntax : $0 number" echo "Use to print multiplication table for given number" exit 1 fi n=$1 for i in 1 2 3 4 5 6 7 8 9 10 do echo "$n * $i = `expr $i \*...

7. UNIX for Dummies Questions & Answers

expr ?!

Hey there i want to subtract the content from $b from $a. Each variable has got 18 values (normal numbers from 0 - 99). How can i subtract them? I know i have to use the expr command, this is what i have till now: a=`cat Tabelle.dat | awk {'print $4'} | awk -F: {'print $1'}` b=`cat...

8. Shell Programming and Scripting

Error with expr - "expr: syntax error"

Hi All, I'm writing a shell script in KSH, where I want to store the filename, total record count and actual record count of all the source files. The source files reside in 4 different sub-folders under the same root folder. Below is code: #!/usr/bin/ksh...

9. Shell Programming and Scripting

If + expr

10. Shell Programming and Scripting

Nn$( expr $n + 1)

HI there I am trying to understand Shell scripting to create my own, I am attempting a few examples can anyone tell me what this means?n=$( expr $n + 1)Tried looking on the internet, but just cannot find its anywhere :( .Help please

LEARN ABOUT FREEBSD

dwarf_add_expr_addr

DWARF_ADD_EXPR_ADDR(3)					   BSD Library Functions Manual 				    DWARF_ADD_EXPR_ADDR(3)

NAME

     dwarf_add_expr_addr, dwarf_add_expr_addr_b -- add a DW_OP_addr location expression

LIBRARY

     DWARF Access Library (libdwarf, -ldwarf)

SYNOPSIS

     #include <libdwarf.h>

     Dwarf_Unsigned
     dwarf_add_expr_addr(Dwarf_P_Expr expr, Dwarf_Unsigned address, Dwarf_Signed sym_index, Dwarf_Error *err);

     Dwarf_Unsigned
     dwarf_add_expr_addr_b(Dwarf_P_Expr expr, Dwarf_Unsigned address, Dwarf_Unsigned sym_index, Dwarf_Error *err);

DESCRIPTION

     Function dwarf_add_expr_addr_b() adds a DW_OP_addr location expression to the location expression descriptor referenced by argument expr.

     Argument expr should reference a location expression descriptor allocated using the function dwarf_new_expr(3).

     Argument address specifies the operand, a relocatable address value.

     Argument sym_index specifies the ELF symbol index of the symbol to be used for relocation.

     If argument err is not NULL, it will be used to store error information in case of an error.

     Function dwarf_add_expr_addr() is deprecated.  It is similar to function dwarf_add_expr_addr_b() except that it cannot handle all possible
     symbol index values.

RETURN VALUES

     On success, these functions return the size in bytes of the location expression byte stream generated.  In case of an error, these functions
     return DW_DLV_NOCOUNT and set the argument err.

ERRORS

     These functions can fail with:

     [DW_DLE_ARGUMENT]	Argument expr was NULL.

     [DW_DLE_MEMORY]	An out of memory condition was encountered during the execution of the function.

SEE ALSO

     dwarf(3), dwarf_add_AT_location_expr(3), dwarf_add_expr_gen(3), dwarf_expr_current_offset(3), dwarf_expr_into_block(3), dwarf_new_expr(3)

BSD
								 September 9, 2011							       BSD

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

expr

Discussion started by: Nathe

2. Shell Programming and Scripting

expr problem

Discussion started by: kotasateesh

3. Shell Programming and Scripting

getting error with expr

Discussion started by: bishweshwar

4. Shell Programming and Scripting

test expr VS [ expr ]

Discussion started by: ashok.g