#!/bin/bash # array-ops.sh: More fun with arrays. array=( zero one two three four five ) # Element 0 1 2 3 4 5 echo ${array[0]} # zero echo ${array:0} # zero # Parameter expansion of first element, #+ starting at position # 0 (1st character). echo ${array:1} # ero # Parameter expansion of first element, #+ starting at position # 1 (2nd character). echo "--------------" echo ${#array[0]} # 4 # Length of first element of array. echo ${#array} # 4 # Length of first element of array. # (Alternate notation) echo ${#array[1]} # 3 # Length of second element of array. # Arrays in Bash have zero-based indexing. echo ${#array[*]} # 6 # Number of elements in array. echo ${#array[@]} # 6 # Number of elements in array. echo "--------------" array2=( [0]="first element" [1]="second element" [3]="fourth element" ) echo ${array2[0]} # first element echo ${array2[1]} # second element echo ${array2[2]} # # Skipped in initialization, and therefore null. echo ${array2[3]} # fourth element exit 0
