Convert string to integer
Do you want to convert string to integer? Here are the methods to extract integer value i from its string representation s.
“1234” to 1234
Method 1:
let i = match s.parse::<i32>() {
Ok(i) => i,
Err(_e) => -1,
};Above s is parsed to 32-bits signed integer here (change number type if needed). -1 is used here as a fallback value, but any error handling instructions can be used.
Method 2:
let i: i32 = s.parse().unwrap_or(0);This explicitly sets the value to 0 if it can’t be parsed to an integer.
Method 3:
let i = s.parse::<i32>().unwrap();This panics if s is not a valid number. s is parsed to 32-bits signed integer here (change number type if needed).
I : Integer := Integer'Value (s);