Comments

Comment code with // or /* */.

Line comments

Everything after // is ignored until end of line.

// this is a comment
let x = 1   // after code
print(x)

// this is a comment
let x: i32 = 1
print(x)

Output

/* ... */ spans multiple lines (non-nested).

/*
 * file header
 */
let total = 1 /* mid-line */ + 2
print(total)

/*
 * file header
 */
let total = 1 /* mid-line */ + 2
print(total)

Output