Rust functions: Difference between revisions
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(Created page with "= Function Signatures = <blockquote> <syntaxhighlight lang="rust"> fn main() { println!("hi"); } </syntaxhighlight> </blockquote><!-- Function Signatures -->") |
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</syntaxhighlight> | </syntaxhighlight> | ||
</blockquote><!-- Function Signatures --> | </blockquote><!-- Function Signatures --> | ||
= Expressions vs Statements = | |||
<blockquote> | |||
* statements include actions without a return value (ends in ;) | |||
* expressions include actions with a return value (no ;) | |||
statement | |||
<syntaxhighlight lang="rust"> | |||
{ | |||
let y = 1; | |||
y += 1; | |||
} // no return val | |||
</syntaxhighlight> | |||
expression | |||
<syntaxhighlight lang="rust"> | |||
let x = { | |||
let y = 1; | |||
y += 1 // <-- no semicolon | |||
} // returns 2 | |||
</syntaxhighlight> | |||
</blockquote><!-- Expressions vs Statements --> | |||
Revision as of 00:47, 7 February 2023
Function Signatures
fn main() { println!("hi"); }
Expressions vs Statements
- statements include actions without a return value (ends in ;)
- expressions include actions with a return value (no ;)
statement
{ let y = 1; y += 1; } // no return valexpression
let x = { let y = 1; y += 1 // <-- no semicolon } // returns 2
