How to generate a random number in vlang?

Question

I want to randomly pick an item in a array.Like javascript code

words[Math.floor(Math.random() * words.length)]

But I don't know how to generate a number like javascript Math.random() function in vlang. Does anyone know ?

Answer 1

Per the documentation at rand, you can use the rand module and for example, the rand.u32n(words.length) function. Make sure you handle the optional case..

Answer 2

There are a few ways

• use choose

import rand
words := ['one', 'two', 'three']
word := rand.choose<string>(words, 1) or {[words[0]]} // this is a list
println(word[0])

• use intn

import rand
words := ['one', 'two', 'three']
word := words[rand.intn(words.len) or {0}]
println(word)