格式输出由一系列定义在 std::fmt 中的宏提供。

包含：

format! : 输出格式化的字符串。

print!  : 输出格式化的字符串到控制台（终端）
println!: 添加一个换行，输出格式化的字符串到控制台（终端）

 
println!("Guess the number!");
 

Guess the number!

 
println!("{} days", 31);
 

31 days

 
println!("{0}, this is {1}. {1}, this is {0}", "Alice", "Bob");
 

Alice, this is Bob. Bob, this is Alice

 
println!("{subject} {verb} {object}",
             object="the lazy dog",
             subject="the quick brown fox",
             verb="jumps over");
 

the quick brown fox jumps over the lazy dog

 
println!("{} of {:b} people know binary, the other half don't", 1, 2);
 

1 of 10 people know binary, the other half don't

 
println!("{number:>width$}", number=1, width=6);
 

“     1”  // 引號是为了显示数字1的前面有五个空白字符而加上的，实际没有。

 
println!("{number:>0width$}", number=1, width=6);
 

000001

 
println!("My name is {0}, {1} {0}.”, "Bond","James");
 

输出：

My name is Bond, James Bond

很多其它语法：http://doc.rust-lang.org/std/fmt/