Title: Vape shop
Content:  programs they are initiating to prevent young people from using their products. Effective June 9, 2016, under California's tobacco laws, the minimum age to purchase tobacco products was raised from 18 to 21 and e-cigarettes were added to the current definition of tobacco products. As part of the rules, e-cigarettes, e-liquids, in addition to vaping devices and accessories, are not permitted to be sold in self-service displays. "Today marks a significant moment in California history as new tobacco control laws go into effect statewide. This is the first time the Golden State has raised the age of sale for tobacco 
Title: Cigarette
Content:  In the United States, the age to buy tobacco products is 21 in all states as of 2020. Similar laws exist in many other countries. In Canada, most of the provinces require smokers to be 19 years of age to purchase cigarettes (except for Quebec and the prairie provinces, where the age is 18). However, the minimum age only concerns the purchase of tobacco, not use. Alberta, however, does have a law which prohibits the possession or use of tobacco products by all persons under 18, punishable by a $100 fine. Australia, New Zealand, Poland, and Pakistan have a nationwide ban on the selling of all tobacco products to people under the age of 18.  Since 1 October 
Title: Smoking age
Content: May include laws that have not yet gone into effect. Washington, D.C. allows recreational cannabis use, but not sales.]] [[File:CannabisPurchaseAge.png|thumb|right|Minimum age to possess and purchase cannabis as of June 2022* Since 2012, various jurisdictions throughout the world have legalized cannabis for recreational use. In Mexico, Uruguay and cannabis-legal jurisdictions in the United States, the legal age to possess or purchase cannabis is identical to the tobacco purchase age (18 in Mexico and Uruguay and 21 in the United States). In Canada, the legal age to possess or purchase cannabis is 19 in all provinces and territories except Alberta (18) and Quebec (21). There are therefore three Canadian provinces (Manitoba, Quebec and Saskatchewan) and two territories (the Northwest Territories and Yukon) where the age to purchase tobacco is lower than the age to possess and purchase cannabis, and one province (Prince Edward Island) where the tobacco purchase age is higher. Prior to December 2019, when the United States raised its tobacco purchase age to 21 in all states and territories, several U.S. states had tobacco purchase ages lower than their cannabis possession and purchase ages.
Title: U.S. history of tobacco minimum purchase age by state
Content:  The minimum purchase age for tobacco in the United States before 2019 varied by state and territory. Since December 2019, the smoking age in all states and territories is 21 after federal law was passed in Congress and signed by President Donald Trump in December 2019.
Title: U.S. history of tobacco minimum purchase age by state
Content:  In the United States, laws regarding the minimum age to purchase and consume tobacco products have been made both by states, territories, the District of Columbia and the federal government. Before 1992, states had the sole power to enforce their own minimum ages. These laws first appeared in the late 19th-century, with New Jersey becoming the first state to set a minimum purchase age of sixteen in 1883. By 1920, around half of states had their minimum purchase age of twenty-one and some simply prohibited "minors" (ages 14–24) from purchasing. During the 1920s, due to tobacco industry lobbying, the minimum ages were lowered across the U.S. and ranged from sixteen to nineteen. By 1939, all states had age 
Title: Smoking age
Content:   The smoking age is the minimum legal age required to purchase or use tobacco products. Most countries have laws that forbid sale of tobacco products to persons younger than certain ages, usually the age of majority. This article does not discuss laws that regulate electronic cigarettes.
Title: Cigarette
Content:  old). Since July 2008, Japan has enforced this age limit at cigarette vending machines through use of the taspo smart card. In other countries, such as Egypt, it is legal to use and purchase tobacco products regardless of age. Germany raised the purchase age from 16 to 18 on the 1 September 2007. Some police departments in the United States occasionally send an underaged teenager into a store where cigarettes are sold, and have the teen attempt to purchase cigarettes, with their own or no ID. If the vendor then completes the sale, the store is issued a fine. Similar enforcement practices are regularly performed by Trading Standards officers in the UK, Israel, and the Republic of Ireland.
Title: 2010 California Proposition 19
Content:  age of 14 but younger than 18, shall be imprisoned in the state prison for a period of three, four, or five years. ; Every person 21 years of age or older who knowingly sells or gives away cannabis to someone older than the age of 18 but younger than 21, shall be imprisoned in county jail for up to six months and fined up to $1,000 per offense. ; Any person who is licensed, permitted, or authorized to sell cannabis, who knowingly sells or gives away cannabis to someone under the age of 21, will be banned from owning, operating, or being employed by a licensed cannabis establishment for one year. 
Title: Nicotine
Content:  In the United States, nicotine products and Nicotine Replacement Therapy products like Nicotrol are only available to persons 21 and above; proof of age is required; not for sale in vending machine or from any source where proof of age cannot be verified. In some states, these products are only available to persons over the age of 21. Many states in the US have implemented a Tobacco 21 law for tobacco products, raising the minimum age from 18 to 21. As of 2019, the minimum age to use tobacco is 21 at the federal level. In the European Union, the minimum age to purchase nicotine products is 18. However, there is no minimum age requirement to use tobacco or nicotine products.
Title: Tobacco 21
Content:  In March 2016, San Francisco joined the ranks of major American cities to pass an ordinance to raise the tobacco and nicotine sales age to 21. The ordinance went into effect on June 1, 2016. Eight days later, California's Tobacco 21 bill went into effect statewide.

Question: what age do you have to be to buy cigarettes in california?
Answer: 21.