AWK is an interpreted programming language designed for searching files for lines that contain certain pattern. AWK release the new version which is known as NAWK or new AWK. AWK was in demand in 1970s and 1980s but in 1990s AWK was replaced by the pearl. AWK matches the lines by lines and when a line matches one of the pattern awk perform specific task on that line. Awk progeams are data-driven programming language in which you have to describe the data you wish to work with, and then what to do when you find it. AWK is different from procedural languages in procedural languages you have to describe in details the steps of the program but AWK programming is independent and easy for write and read.
atan2(y,x)
Return the arctangent of y/x in radians. {N}
break
Exit from a while, for, or do loop.
close(filename-expr)close(command-expr)
continue
Begin next iteration of while, for, or do loop.
cos(x)
Return the cosine of x, an angle in radians. {N}
delete array[element] delete array
Delete element from array
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