Function float_repr

crates/stdlib/src/math.rs:943–961

Format a float in Python style (ensures trailing .0 for integers).

(value: f64)

/// Format a float in Python style (ensures trailing .0 for integers).
fn float_repr(value: f64) -> String {
    if value.is_nan() {
        "nan".to_owned()
    } else if value.is_infinite() {
        if value.is_sign_positive() {
            "inf".to_owned()
        } else {
            "-inf".to_owned()
        }
    } else {
        let s = format!("{}", value);
        // If no decimal point and not in scientific notation, add .0
        if !s.contains('.') && !s.contains('e') && !s.contains('E') {
            format!("{}.0", s)
        } else {
            s
        }
    }
}