rust
/
book
mirror of https://github.com/rust-lang/book
1
0
Fork 0
Code Issues Releases Wiki Activity

Explain both kinds of format string arguments 

Fixes #3325.
This commit is contained in:
Carol (Nichols || Goulding) 2022-09-13 21:14:04 -04:00 committed by Carol (Nichols || Goulding)
parent f801008f55
commit 9a3822ee96
1 changed files with 8 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/ch02-00-guessing-game-tutorial.md
View File

@ -274,19 +274,21 @@ the code so far:
This line prints the string that now contains the user’s input. The `{}` set of
curly brackets is a placeholder: think of `{}` as little crab pincers that hold
a value in place. You can print more than one value using curly brackets: the
first set of curly brackets holds the first value listed after the format
string, the second set holds the second value, and so on. Printing multiple
values in one call to `println!` would look like this:
a value in place. When printing the value of a variable, the variable name can
go inside the curly brackets. When printing the result of evaluating an
expression, place empty curly brackets in the format string, then follow the
format string with a comma-separated list of expressions to print in each empty
curly bracket placeholder in the same order. Printing a variable and the result
of an expression in one call to `println!` would look like this:
```rust
let x = 5;
let y = 10;
println!("x = {x} and y = {y}");
println!("x = {x} and y + 2 = {}", y + 2);
```
This code would print `x = 5 and y = 10`.
This code would print `x = 5 and y = 12`.
### Testing the First Part