{"id":4783,"date":"2015-06-17T21:24:55","date_gmt":"2015-06-17T19:24:55","guid":{"rendered":"http:\/\/www.valcon.it\/pp\/?p=4783"},"modified":"2025-08-26T18:07:03","modified_gmt":"2025-08-26T16:07:03","slug":"prng-funzioni","status":"publish","type":"post","link":"https:\/\/www.valcon.it\/pp\/prng-funzioni\/","title":{"rendered":"Numeri pseudocasuali – Funzioni"},"content":{"rendered":"\n
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Calcolo d. prob. e stat.<\/a><\/div>\n<\/div>\n\n\n\n

Gli ambienti di sviluppo rendono disponibili una o pi\u00f9 funzioni per la generazione di numeri casuali<\/em><\/p>\n\n\n\n

<\/th><\/th>Reali<\/th>Interi<\/th><\/tr><\/thead>
BASIC<\/strong><\/td>RND()<\/tt><\/strong><\/td>[0.0…1.0)<\/td> <\/td><\/tr>
Calc \/ Excel<\/strong><\/td>CASUALE()<\/tt><\/strong><\/td>[0.0…1.0)<\/td><\/td><\/tr>
<\/td>CASUALE.TRA(INF; SUP)<\/tt><\/strong><\/td><\/td>[INF, SUP]<\/td><\/tr>
GeoGebra<\/strong><\/td>random()<\/tt><\/strong><\/td>[0.0…1.0)<\/td><\/td><\/tr>
Java \/ Javascript<\/strong><\/td>Math.random()<\/tt><\/strong><\/td>[0.0…1.0)<\/td> <\/td><\/tr>
Pascal<\/strong><\/td>Random<\/tt><\/strong><\/td>[0.0…1.0)<\/td><\/td><\/tr>
<\/td>Random(SUP)<\/tt><\/strong><\/td><\/td>[0, SUP-1]<\/td><\/tr>
Python<\/strong><\/td>random.random()<\/tt><\/strong><\/td>[0.0…1.0)<\/td><\/td><\/tr>
<\/td>random.uniform(INF,SUP)<\/tt><\/strong><\/td>[INF, SUP)<\/td><\/td><\/tr>
<\/td>random.randint(INF,SUP)<\/tt><\/strong><\/td><\/td>[INF, SUP]<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Numeri in un intervallo<\/h2>\n\n\n\n

A partire dalla funzione di base si possono ottenere numeri distribuiti uniformemente in un intervallo a piacere.<\/p>\n\n\n\n

Numeri reali (sostituisci CASUALE() con la funzione specifica del linguaggio)<\/p>\n\n\n\n

<\/th>[0..1)<\/th>[0..SUP)<\/th>[0..SUP-INF)<\/th>[INF..SUP)<\/th><\/tr><\/thead>
Calc \/ Excel<\/strong><\/td>CASUALE()<\/td>SUP*CASUALE()<\/td>(SUP-INF)*CASUALE()<\/td>(SUP-INF)*CASUALE()+INF<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Numeri interi<\/p>\n\n\n\n

<\/th>[0, SUP-1]<\/th>[1, SUP]<\/th>[INF, SUP]<\/th><\/tr><\/thead>
Java<\/strong><\/td>(int)(SUP*Math.random()<\/strong>)
<\/tt><\/td>		(int)(SUP*Math.random()<\/strong>+1)<\/tt><\/td>(int)((SUP-INF+1)<\/tt>
*Math.random()<\/strong>+INF)<\/tt><\/td><\/tr>
Javascript<\/strong><\/td>Math.floor(SUP*Math.random()<\/strong>)
<\/tt><\/td>		Math.floor<\/tt>(SUP*Math.random()<\/strong>+1)<\/tt><\/td>Math.floor<\/tt>((SUP-INF+1)<\/tt>
*Math.random()<\/strong>+INF)<\/tt><\/td><\/tr>
Pascal<\/strong><\/td>Random(SUP)<\/tt><\/td>Random(SUP)+1<\/tt><\/td>Random(SUP-INF+1)+INF<\/tt><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n