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What is IFS?

Uncertainties remains for Input Internal Field Separator - it's a character that isolates fields. In the case you posted, it is set to new line character (\n); so after you set it, for will process content line by line. In that case, you could change the estimation of IFS (to some letter that you have in your information document) and check how content will be part.

Note that IFS is additionally utilized for joining parameters for yield. From the bash man page: "When the extension happens inside twofold quotes, it extends to a solitary word with the estimation of every parameter isolated by the primary character of the IFS exceptional variable."

Ifs Utilization

Ifs isn't straightforwardly identified with looping, it's identified with word part. Uncertainties by implication decides how the yield from the summon is separated into pieces that the circle emphasizes over.

When you have an unprotected variable substitution $foo or summon substitution $(foo), there are two cases:

In the event that the setting expects a solitary word, e.g. at the point when the substitution is between twofold quotes "$foo", or in a variable task x=$foo, at that point the string coming about because of the substitution is utilized as-seems to be.

On the off chance that the setting expects different words, which is the situation a large portion of the circumstances, at that point two further extensions are performed on the subsequent string:

The string is part into words. Any character that shows up in $IFS is viewed as a word separator. For instance IFS=":"; foo="12:34::78"; reverberate $foo prints 12 34 78 (with two spaces in the vicinity of 34 and 78, since there's a vacant word).

Each word is dealt with as a glob design and ventured into a rundown of record names. For instance, foo="*"; reverberate $foo prints the rundown of records in the present index.

Example of If