Arrays

• Associative arrays
• Sparse storage
• Index need not be integer
  • Basically arrays are like hash maps
• arr[index]=value
• for (var in arr)
• delete arr[index]

Loops

Functions

• awk is a command!
  • AWK is a powerful text processing tool
• Above there are two -f flags (options)
  • Both options requires option argument
• Finally using | the input file (infile) is sent