Why does print work with awk but echo doesn't?
To sum it up....
This works:
awk 'BEGIN { FS=":"; }
{ print $1 $3 $5; }' /etc/passwd
But this doesn't:
awk 'BEGIN { FS=":"; }
{ echo $1 $3 $5; }' /etc/passwd
I would like to know why.
awk echo
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
asked Mar 24 '16 at 4:24
user3271166
1615
add a comment |
To sum it up....
This works:
awk 'BEGIN { FS=":"; }
{ print $1 $3 $5; }' /etc/passwd
But this doesn't:
awk 'BEGIN { FS=":"; }
{ echo $1 $3 $5; }' /etc/passwd
I would like to know why.
awk echo
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
asked Mar 24 '16 at 4:24
user3271166
1615
1
printis a keyword in Awk;echois a shell word. Your examples are Awk examples that happen to be run in a shell...
– jasonwryan
Mar 24 '16 at 4:34
3
1. becauseawkdoesn't have anechokeyword, it hasprintinstead. 2. becauseawkandsh(orbash/dash/zsh/kshetc. andperl. andpython) are different scripting languages and have different keywords and syntax.
– cas
Mar 24 '16 at 5:15
add a comment |
To sum it up....
This works:
awk 'BEGIN { FS=":"; }
{ print $1 $3 $5; }' /etc/passwd
But this doesn't:
awk 'BEGIN { FS=":"; }
{ echo $1 $3 $5; }' /etc/passwd
I would like to know why.
awk echo
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
asked Mar 24 '16 at 4:24
user3271166
1615
To sum it up....
This works:
awk 'BEGIN { FS=":"; }
{ print $1 $3 $5; }' /etc/passwd
But this doesn't:
awk 'BEGIN { FS=":"; }
{ echo $1 $3 $5; }' /etc/passwd
I would like to know why.
awk echo
awk echo
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
asked Mar 24 '16 at 4:24
user3271166
1615
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
asked Mar 24 '16 at 4:24
user3271166
1615
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
edited 2 hours ago
Rui F Ribeiro
39.2k1479130
39.2k1479130
asked Mar 24 '16 at 4:24
user3271166
1615
asked Mar 24 '16 at 4:24
user3271166
1615
asked Mar 24 '16 at 4:24
user3271166
1615
1615
1
printis a keyword in Awk;echois a shell word. Your examples are Awk examples that happen to be run in a shell...
– jasonwryan
Mar 24 '16 at 4:34
3
1. becauseawkdoesn't have anechokeyword, it hasprintinstead. 2. becauseawkandsh(orbash/dash/zsh/kshetc. andperl. andpython) are different scripting languages and have different keywords and syntax.
– cas
Mar 24 '16 at 5:15
add a comment |
1
printis a keyword in Awk;echois a shell word. Your examples are Awk examples that happen to be run in a shell...
– jasonwryan
Mar 24 '16 at 4:34
3
1. becauseawkdoesn't have anechokeyword, it hasprintinstead. 2. becauseawkandsh(orbash/dash/zsh/kshetc. andperl. andpython) are different scripting languages and have different keywords and syntax.
– cas
Mar 24 '16 at 5:15
1
1
print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...– jasonwryan
Mar 24 '16 at 4:34
print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...– jasonwryan
Mar 24 '16 at 4:34
3
3
1. because
awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.– cas
Mar 24 '16 at 5:15
1. because
awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.– cas
Mar 24 '16 at 5:15
add a comment |
1 Answer
1
active
oldest
votes
The structure of awk execution is: pattern { action statements }
Actions
Action statements are enclosed in braces, { and }. Action statements
consist of the usual assignment, conditional, and looping statements
found in most languages. The operators, control statements, and
input/output statements available are patterned after those in C.
printis I/O statement ofawk.
From manpage:
print Print the current record. The output record is terminated with the value of ORS.
Visit manual>The print Statement:
The print Statement
Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:
print item1, item2, …
Visit man awk for more details.
Also note that:
PATTERNS AND ACTIONS
AWK is a line-oriented language. The pattern comes first, and then the action. Action statements are
enclosed in { and }. Either the pattern may be missing, or the action may be missing, but, of course, not
both. If the pattern is missing, the action is executed for every single record of input. A missing action
is equivalent to
{ print }
which prints the entire record.
awk doesn't have echo keyword/statement.
$ man awk | grep echo | wc -l
0
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The structure of awk execution is: pattern { action statements }
Actions
Action statements are enclosed in braces, { and }. Action statements
consist of the usual assignment, conditional, and looping statements
found in most languages. The operators, control statements, and
input/output statements available are patterned after those in C.
printis I/O statement ofawk.
From manpage:
print Print the current record. The output record is terminated with the value of ORS.
Visit manual>The print Statement:
The print Statement
Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:
print item1, item2, …
Visit man awk for more details.
Also note that:
PATTERNS AND ACTIONS
AWK is a line-oriented language. The pattern comes first, and then the action. Action statements are
enclosed in { and }. Either the pattern may be missing, or the action may be missing, but, of course, not
both. If the pattern is missing, the action is executed for every single record of input. A missing action
is equivalent to
{ print }
which prints the entire record.
awk doesn't have echo keyword/statement.
$ man awk | grep echo | wc -l
0
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
add a comment |
The structure of awk execution is: pattern { action statements }
Actions
Action statements are enclosed in braces, { and }. Action statements
consist of the usual assignment, conditional, and looping statements
found in most languages. The operators, control statements, and
input/output statements available are patterned after those in C.
printis I/O statement ofawk.
From manpage:
print Print the current record. The output record is terminated with the value of ORS.
Visit manual>The print Statement:
The print Statement
Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:
print item1, item2, …
Visit man awk for more details.
Also note that:
PATTERNS AND ACTIONS
AWK is a line-oriented language. The pattern comes first, and then the action. Action statements are
enclosed in { and }. Either the pattern may be missing, or the action may be missing, but, of course, not
both. If the pattern is missing, the action is executed for every single record of input. A missing action
is equivalent to
{ print }
which prints the entire record.
awk doesn't have echo keyword/statement.
$ man awk | grep echo | wc -l
0
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
add a comment |
The structure of awk execution is: pattern { action statements }
Actions
Action statements are enclosed in braces, { and }. Action statements
consist of the usual assignment, conditional, and looping statements
found in most languages. The operators, control statements, and
input/output statements available are patterned after those in C.
printis I/O statement ofawk.
From manpage:
print Print the current record. The output record is terminated with the value of ORS.
Visit manual>The print Statement:
The print Statement
Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:
print item1, item2, …
Visit man awk for more details.
Also note that:
PATTERNS AND ACTIONS
AWK is a line-oriented language. The pattern comes first, and then the action. Action statements are
enclosed in { and }. Either the pattern may be missing, or the action may be missing, but, of course, not
both. If the pattern is missing, the action is executed for every single record of input. A missing action
is equivalent to
{ print }
which prints the entire record.
awk doesn't have echo keyword/statement.
$ man awk | grep echo | wc -l
0
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
The structure of awk execution is: pattern { action statements }
Actions
Action statements are enclosed in braces, { and }. Action statements
consist of the usual assignment, conditional, and looping statements
found in most languages. The operators, control statements, and
input/output statements available are patterned after those in C.
printis I/O statement ofawk.
From manpage:
print Print the current record. The output record is terminated with the value of ORS.
Visit manual>The print Statement:
The print Statement
Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:
print item1, item2, …
Visit man awk for more details.
Also note that:
PATTERNS AND ACTIONS
AWK is a line-oriented language. The pattern comes first, and then the action. Action statements are
enclosed in { and }. Either the pattern may be missing, or the action may be missing, but, of course, not
both. If the pattern is missing, the action is executed for every single record of input. A missing action
is equivalent to
{ print }
which prints the entire record.
awk doesn't have echo keyword/statement.
$ man awk | grep echo | wc -l
0
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
edited Mar 24 '16 at 5:22
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
answered Mar 24 '16 at 4:38
Pandya
8,6241549103
8,6241549103
add a comment |
add a comment |
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1
printis a keyword in Awk;echois a shell word. Your examples are Awk examples that happen to be run in a shell...– jasonwryan
Mar 24 '16 at 4:34
3
1. because
awkdoesn't have anechokeyword, it hasprintinstead. 2. becauseawkandsh(orbash/dash/zsh/kshetc. andperl. andpython) are different scripting languages and have different keywords and syntax.– cas
Mar 24 '16 at 5:15