Shell Programming and Scripting

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3
3

[home@perl_beginner]awk '{if($1>=300 && $1<500){x++};else if ($1>=500 && $1<1000){y++} }END{print x"\n"y}' input_file.txt
awk: {if($1>=300 && $1<500){x++};else if ($1>=500 && $1<1000){y++} }END{print x"\n"y}
awk:                             ^ syntax error

[home@perl_beginner]$ awk '{if($1>=300 && $1<500){x++};}END{print x}' input_file.txt 
3
[home@perl_beginner]$ awk '{if($1>=500 && $1<1000){x++};}END{print x}' input_file.txt 
3

awk '
{
    if( $1>=300 && $1<500)
    {
        x++;                # semicolon needs to be inside the brackets.
    }
    else
    if ($1>=500 && $1<1000)
    {
        y++;
     }
}
END {
    print x"\n"y
}' input_file.txt