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JJJohn avatar Ubuntu

How do I get the formatted text as in direct passing a string?

th flag
JJJohn

direct passing a string with $ to echo

$ echo $'#include <iostream>\nint main() {\n  std::cout << \"Hello World!\" << std::endl;\n}'

expands the embedded ANSI escape sequences

#include <iostream>
int main() {
  std::cout << "Hello World!" << std::endl;
}

I assigned the string to a variable

codeStr='#include <iostream>\nint main() {\n  std::cout << \"Hello World!\" << std::endl;\n}'

and then echo the variable

echo $codeStr

I got the raw string rather than a formatted text.

How do I get the formatted text as in direct passing a string?

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Score:1
Liso avatar Ubuntu
sd flag
Liso

Use -e switch to enable interpretation of backslash escapes.

$ codeStr='#include <iostream>\nint main() {\n  std::cout << \"Hello World!\" << std::endl;\n}'
$ echo -e $codeStr 
#include <iostream>
int main() {
 std::cout << \"Hello World!\" << std::endl;
}
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hr flag
steeldriver
... note that whereas `$'...'` treats `\"` as an escape sequence, the bash shell's builtin `echo -e` doesn't (hence the output here is actually different from the OP's). See also [Why is printf better than echo?](https://unix.stackexchange.com/questions/65803/why-is-printf-better-than-echo)
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