Title: Switzerland–European Union relations
Content:  The currency of Switzerland is the Swiss franc. Switzerland (with Liechtenstein) is in the unusual position of being surrounded by countries that use the euro. As a result, the euro is de facto accepted in many places, especially near borders and in tourist regions. Swiss Federal Railways accept euros, both at ticket counters and in automatic ticket machines. Also many public phones, vending machines or ticket machines accept euro coins. Many shops and smaller businesses that accept euros take notes only, and give change in Swiss francs, usually at a less favourable exchange rate than banks. Many bank cash machines 
Title: Swiss franc
Content:  The Swiss franc (Franken, franc, franco and franc; sign: Fr. (in German language), fr. (in French, Italian, Romansh languages), or CHF in any other language, or internationally; code: CHF) is the currency and legal tender of Switzerland and Liechtenstein. It is also legal tender in the Italian exclave of Campione d'Italia. The Swiss National Bank (SNB) issues banknotes and the federal mint Swissmint issues coins. The smaller denomination, a hundredth of a franc, is a Rappen (Rp.) in German, centime (c.) in French, centesimo (ct.) in Italian, and rap (rp.) in Romansh. The ISO 4217 code of the currency is CHF, 
Title: Swiss franc
Content:  The Swiss franc is the currency and legal tender of Switzerland and Liechtenstein and also legal tender in the Italian exclave of Campione d'Italia. Although not formally legal tender in the German exclave of Büsingen am Hochrhein (the sole legal currency is the euro), it is in wide daily use there; with many prices quoted in Swiss francs. The Swiss franc is the only version of the franc still issued in Europe. As of March 2010, the total value of released Swiss coins and banknotes was 49.6640 billion Swiss francs. Combinations of up to 100 circulating Swiss coins (not including special or commemorative coins) are legal tender; banknotes are legal tender for any amount.
Title: Franc
Content:  The Swiss franc (ISO code: CHF or 756), which appreciated significantly against the new European currency from April to September 2000, remains one of the world's strongest currencies, worth today around five-sixths of a euro. The Swiss franc is used in Switzerland and in Liechtenstein. Liechtenstein retains the ability to mint its own currency, the Liechtenstein franc, which it does from time to time for commemorative or emergency purposes. The name of the country "Swiss Confederation" is found on some of the coins in Latin (Confoederatio Helvetica), as Switzerland has four official languages, all of which are used on the notes. The denomination is abbreviated "Fr." on the coins which is the abbreviation in all four languages.
Title: List of motifs on banknotes
Content:  The official currency of Switzerland is the Swiss franc (CHF). The motifs used are:
Title: Legal tender
Content:  The Swiss franc is the only legal tender in Switzerland. Any payment consisting of up to 100 Swiss coins is legal tender; banknotes are legal tender for any amount. The sixth series of Swiss bank notes from 1976, recalled by the National Bank in 2000, and the eighth series from the 1990's, withdrawn in 2021, are both no longer legal tender, but banknotes can be exchanged by the Swiss National Bank or other authorized banks for current notes without limitation as to time. The Swiss franc is also the legal tender of the Principality of Liechtenstein, which is joined to Switzerland in a customs union. The Swiss franc is also the currency used for administrative and accounting purposes by most of the numerous international organisations that are headquartered in Switzerland.
Title: Liechtenstein franc
Content:  The Swiss franc (plural: francs; in German: Frank, plural: Franken) has been the currency of Liechtenstein since 1920. The Swiss franc is legal tender since Liechtenstein is in a customs and monetary union with Switzerland. The 1980 treaty between Switzerland and Liechtenstein allows Liechtenstein to mint limited amounts of Swiss francs with a Liechtenstein inscription, but only in the form of commemorative coins (mainly issued for collectors), and they are not allowed to issue banknotes. Liechtenstein used the Austrian krone and heller until 1920, and switched to the Swiss franc due to the krone's instability. Liechtenstein coins are so rare that they do not actually circulate, and no banknotes have been issued, with 
Title: Zürich frank
Content:  The Franc was the currency of the Helvetic Republic from 1798. The Helvetic Republic ceased issuing coins in 1803, Zürich again minted its own coins between 1806 and 1848. In 1850, the Swiss franc was introduced, with 1 Zürich franc = 1.4597 Swiss francs.
Title: Swiss franc
Content:  is used by banks and financial institutions. The official symbols Fr. (German symbol) and fr. (Latin languages) are widely used by businesses and advertisers, also for the English language. According to ''Art. 1 SR/RS 941.101 of the federal law collection the internationally official abbreviation – besides the national languages – however is CHF'', also in English; respective guides also request to use the ISO 4217 code. The use of SFr. for Swiss Franc and fr.sv. are outdated. The Latinate "CH" stands for Confoederatio Helvetica. Given the different languages used in Switzerland, Latin is used for language-neutral inscriptions on its coins.
Title: Zürich frank
Content:   The Frank was the currency of the Swiss canton of Zürich between 1806 and 1850. It was subdivided into 10 Batzen, each of 10 Rappen, with 3 Heller to the Rappen and 4 Rappen to the Schilling. It was worth 1⁄4th the French silver écu or 6.67 g fine silver.

Question: what currency do they use in switzerland?
Answer: Swiss franc.