Refer to the following algorithm written in pseudocode:
1 Set sensor_readings To [101.3, 101.5, 100.8, 102.1, 101.9, 102.4]
2 Set pointer To 0
3 While pointer < 6
4 Print(sensor_readings[pointer] * 2)
5 Set pointer To pointer + 1
6 EndWhile
What type of data structure is the variable sensor_readings?