28 lines
666 B
Rust
28 lines
666 B
Rust
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use std::env;
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fn main() {
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let args: Vec<String> = env::args().collect();
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if args.len() != 2 {
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println!("Usage: ./primes $MAX");
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return;
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}
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let max: u64 = args[1].parse().expect("MAX must be an integer value");
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let mut i: u64 = 3;
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while i <= max {
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let loop_max: u64 = (i as f64).sqrt() as u64;
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let mut x: u64 = 2;
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let mut prime = true;
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while x <= loop_max {
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if i % x == 0 {
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prime = false;
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break;
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}
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x += 1;
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}
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if prime {
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println!("{}", i)
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}
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i += 2;
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}
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}
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