Shell: Read and output each row of the file

Statement 1:
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#! /Bin/bash

While read line
Do
Echo $ line
Done <file (file to be read)
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Statement 2:
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#! /Bin/bash

Cat file (file to be read) | while read line
Do
Echo $ line
Done
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Statement 3:
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For line in 'cat file (file to be read )'
Do
Echo $ line
Done
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Note:
For row-by-row reading is different from while row-by-row reading, for example:
$ Cat File
Aaaa
Bbbb
CCCC dddd

$ Cat file | while read line; do echo $ line; done
Aaaa
Bbbb
CCCC dddd

$ For line in $ (<file); Do echo $ line; done
Aaaa
Bbbb
CCCC
Dddd

= Practice = #! Bin/sh # $ STR = 'HTTP: // response $ {STR # * fo} # echo $ {STR # fo} while read linedo wget-p $ {line: 0: 59} done <'/root/MySQL. log ';