Shell Programming and Scripting

Hello STCET22,

Following explaination may help you in same.

Code:

awk '{printf "%06d,",NR} 1' Input_file

printf is to print the values, %06d it specifies the minimum number of digits to print(as we want to print 5 zeros with value of Line number so it will print 5 zeros and then line number), NR The total number of input records seen so far or line number, at last as we know awk works as condition { action statements } so I have given here 1 which indicates that condition should be true and if no action is given then by default action which is print will happen, so it will print complete line value(already it has printed line number with 5 zeros then it will print the actual line content.). Then it will read next line and so on, there is one more thing here called ORS means Output record seperator if didn't specify it by default it will be \n(new line) so when it prints complete line it will print ORS next line also.


Thanks,
R. Singh