Awk Else Syntax Error
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error in awk if else up vote 0 down vote favorite I am using if else statements in awk. Everytime when I use it I am getting a syntax error. Could anyone tell me how to use this? I am getting syntax error shown below. Code: awk '{ FS = "=" ;if($1 ~ /Hi/) {if (!($1=="Hi")) {print $1;}} else {if($1=="bye") {print $1;}}} else {if(if($1=="good") awk if syntax error {print $1;}}} END {print $1}' Output: awk: { FS = "=" ;if($1 ~ /Hi/) {if (!($1=="Hi")) {print $1;}} else {if($1=="bye") {print $1;}}} else {if(if($1=="good") {print $1;}}} END {print $1} awk: ^ syntax error awk: { FS = "=" ;if($1 ~ /Hi/) {if (!($1=="Hi")) {print $1;}} else {if($1=="bye") {print $1;}}} else {if(if($1=="good") {print $1;}}} END {print $1} awk: ^ syntax error awk: { FS = "=" ;if($1 ~ /Hi/) {if (!($1=="Hi")) {print $1;}} else {if($1=="bye") {print $1;}}} else {if(if($1=="good") {print $1;}}} END {print $1} awk: ^ syntax error awk syntax-error share|improve this question edited Jun 24 '12 at 8:31 mtk 5,537103482 asked Jun 24 '12 at 7:36 User 116314 1 Can you produce a short, reproducable example and post it here, an SSCCE , please? –user unknown Jun 24 '12 at 7:44 Ya sure . I am editing the question –User Jun 24 '12 at 7:46 The if inside of the if condition is suspicious. Is that what you want? –Ray Toal Jun 24 '12 at 7:46 Please use proper code formatting. There's a button for it in the editor, click on the ora
Scripting Unix shell scripting - KSH, CSH, SH, BASH, PERL, PHP, SED, AWK and shell scripts and shell scripting languages here. Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... learn unix and linux commands awk if else syntax error Shell awk switch case syntax error Programming and Scripting Thread Tools Search this Thread Display Modes else syntax error python #1 02-09-2015 Andrew767 Registered User Join Date: Feb 2015 Last Activity: 9 February 2015, 6:02 PM EST Posts: 1 Thanks: 0 Thanked 0 Times in eclipse else syntax error 0 Posts awk if else syntax error Could somebody gently point out the error of my ways in the below (the flu I'm fighting might be contributing to my current haplessness) Code: awk -F="\t" \ '{ for (i = 1; i <= NR; i++); FNR http://stackoverflow.com/questions/11175788/syntax-error-in-awk-if-else == i; { if (length($3) < 56 && length($1) > 56) $1=($1" "$2); $2=$3; $3=$4; {j=5; while (j < NF) {$3=($3" "$j); j++} }; else {j=4; while (j < NF) {$3=($3" "$j); j++} }; } print $1 "\t" $2 "\t" $3 "\t" $(NF) } END {}' Remove advertisements Sponsored Links Andrew767 View Public Profile Find all posts by Andrew767 #2 02-09-2015 Don Cragun Moderator Join Date: Jul 2012 Last Activity: 1 October 2016, 4:41 PM EDT Location: San Jose, CA, USA Posts: 9,411 Thanks: http://www.unix.com/shell-programming-and-scripting/255296-awk-if-else-syntax-error.html 434 Thanked 3,172 Times in 2,722 Posts With no sample input, no indication of what your script is supposed to do, no desired output, no indication of what operating system you're using, and no indication of what errors you're getting; it is hard to suggest what you need to do to fix your problems. But, here are a couple of comments that may help you decide what you want to change... Code: 1 awk -F="\t" \ 2 '{ 3 for (i = 1; i <= NR; i++); 4 FNR == i; 5 { 6 if (length($3) < 56 && length($1) > 56) 7 $1=($1" "$2); $2=$3; $3=$4; 8 {j=5; while (j < NF) {$3=($3" "$j); j++} }; 9 else 10 {j=4; while (j < NF) {$3=($3" "$j); j++} }; 11 } 12 print $1 "\t" $2 "\t" $3 "\t" $(NF) 13 } 14 END {}' The if statement on lines 6 and 7 is treated as: Code: 6 if (length($3) < 56 && length($1) > 56) 7 $1=($1" "$2); The remainder of line 7 contains two assignment statements that are executed independently of whether or not the expression in the if statement is true or false. The else on line 9 is not associated with an if statement. The END {} on line 14 can be removed without affecting the operation of your awk script. Remove advertisements Sponsored Links Don Cragun View Public Profile Find all posts by Don Cragun « Previous Thread | Next Thread » Thread Tools Show Printable Version Email this Page Subscribe to this Thread Display Modes Linear M
awk articles, we discussed about awk print, awk user-defined variables, awk built-in variables, and awk operators. In this http://www.thegeekstuff.com/2010/02/awk-conditional-statements awk tutorial, let us review awk conditional if statements with practical examples. Awk supports lot of conditional statements to control the flow of the program. Most of the Awk conditional statement http://www.staff.science.uu.nl/~oostr102/docs/nawk/nawk_71.html syntax are looks like ‘C' programming language. Normally conditional statement checks the condition, before performing any action. If the condition is true action(s) are performed. Similarly action can be performed syntax error if the condition is false. Conditional statement starts with the keyword called ‘if'. Awk supports two different kind of if statement. Awk Simple If statement Awk If-Else statement Awk If-ElseIf-Ladder Awk Simple If Statement Single Action: Simple If statement is used to check the conditions, if the condition returns true, it performs its corresponding action(s). Syntax: if (conditional-expression) action if is a awk syntax error keyword conditional-expression - expression to check conditions action - any awk statement to perform action. Multiple Action: If the conditional expression returns true, then action will be performed. If more than one action needs to be performed, the actions should be enclosed in curly braces, separating them into a new line or semicolon as shown below. Syntax: if (conditional-expression) { action1; action2; } If the condition is true, all the actions enclosed in braces will be performed in the given order. After all the actions are performed it continues to execute the next statements. Awk If Else Statement In the above simple awk If statement, there is no set of actions in case if the condition is false. In the awk If Else statement you can give the list of action to perform if the condition is false. If the condition returns true action1 will be performed, if the condition is false action 2 will be performed. Syntax: if (conditional-expression) action1 else action2 Awk also has conditional operator i.e ternary operator ( ?: ) whose feature is similar to the awk If Else S
what the rest of the statement will do. If condition is true, then-body is executed; otherwise, else-body is executed (assuming that the else clause is present). The else part of the statement is optional. The condition is considered false if its value is zero or the null string, and true otherwise. Here is an example: if (x % 2 == 0) print "x is even" else print "x is odd" In this example, if the expression x % 2 == 0 is true (that is, the value of x is divisible by 2), then the first print statement is executed, otherwise the second print statement is performed. If the else appears on the same line as then-body, and then-body is not a compound statement (i.e., not surrounded by curly braces), then a semicolon must separate then-body from else. To illustrate this, let's rewrite the previous example: awk '{ if (x % 2 == 0) print "x is even"; else print "x is odd" }' If you forget the `;', awk won't be able to parse the statement, and you will get a syntax error. We would not actually write this example this way, because a human reader might fail to see the else if it were not the first thing on its line. Go to the first, previous, next, last section, table of contents.