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4.9.10 Summary of getline Variants
table-getline-variants
summarizes the eight variants of getline,
listing which built-in variables are set by each one,
and whether the variant is standard or a gawk extension.
| Variant | Effect | Standard / Extension |
|---|---|---|
getline | Sets $0, NF, FNR, and NR | Standard |
getline var | Sets var, FNR, and NR | Standard |
getline < file | Sets $0 and NF | Standard |
getline var < file | Sets var | Standard |
command | getline | Sets $0 and NF | Standard |
command | getline var | Sets var | Standard |
command |& getline | Sets $0 and NF | Extension |
command |& getline var | Sets var | Extension |
Table 4.1: getline Variants and What They Set