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What is the use of format specifier %x ?
What is the use of format specifier %% ?
What is the use of string function sub(regex,replacement,string)?
What is the use of string functiong sub(regex,replacement,string)?
How add a first record and last record to the current file in linux?
What is the use of numeric function exp ?
What is the use of string function gensub(r,s,h [,t])?
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