Electronic cigarette is a battery-operated device which vaporizes nicotine solution into a form of inhalable aerosol. This product usually contains nicotine and also a variety of flavourings such as tobacco, menthol, fruits and coffee which are dissolved in propylene glycol, glycerine or a mixture of these two substances. The Ministry of Health Malaysia defines e-cigarette as nicotine containing while vape does not. The NECS 2016 was done to measure the prevalence and characteristics of e-cigarette/vape (ECV) use among Malaysian adults. This study also assessed the public perception on ECV. This was a multi-stage stratified cluster sampling household survey representing all Malaysian adults aged 18 years at national and urban/rural level. A total of 4,288 adults from all the states were selected and weighted using complex sampling method to represent 19 million Malaysians.