"does not name a type" issue

Hi, I'm using an arduino mega, and when I want to upload my program it's says, "serial does not name a type" but i don't understand i have the good librairies ... And at first it was working well..
if someone has an idea about what could have happened ?

Here is my program:

#include <LiquidCrystal.h>

#include <LiquidCrystal_I2C.h>

#include <SoftwareSerial.h>

#define PIN_TX 10  
#define PIN_RX 11

//initialisation des valeurs recupérées toutes les 5MIN
const int capteur = A9 ;
int valeur = 0 ;
float temp;
const int capteur2 = A13 ;
int valeur2 = 0;
float hum;

//initialisation des min max moy 1=temperature
float min1;
float max1;
float somme_valeurs1 = 0.0;
int nbr_valeurs1 = 0 ;
float moytotale1;

//initialisation des min max moy 2=humidité
float min2;
float max2;
float somme_valeurs2 = 0.0;
int nbr_valeurs2 = 0 ;
float moytotale2;

SoftwareSerial mySerial(PIN_TX,PIN_RX);


void setup() {
  // put your setup code here, to run once:
  mySerial.begin(9600);
  Serial.begin(9600);
  delay(1000); 
  //initialisation de premiere valeur du minimum et maximum temperature
  valeur = analogRead(capteur);
  temp = valeur * 5.0 /100;
  min1 = temp;
  max1 = temp;

  //initialisation de premiere valeur du minimum et maximum humidité
  valeur2 = analogRead(capteur2);
  hum = valeur2 * 50/ 5.38 /100;
  min2 = hum;
  max2 = hum;
}
void loop() {
  // put your main code here, to run repeatedly:
 
  //delay(30000); //5min
    //TEMPERATURE
    valeur = analogRead(capteur);
    // conversion temp de la valeur lue en degres
    temp = valeur * 5.0 /100;
    Serial.println("la temperature est de:");
    Serial.println(temp);
    //minimum temperature
    if (temp < min1){
      min1 = temp;
    }
    //maximum temperature
    if (temp > max1){
      max1 = temp;
    }
    //accumulation des valeurs pour le calcul de la moyenne des valeurs de temperature en fin de boucle
    nbr_valeurs1 += 1;
    somme_valeurs1 += temp;
    
    //HUMIDITE
     valeur2 = analogRead(capteur2);
    // conversion humidité valeur en pourcentage
    hum = valeur2 * 50/ 5.38 /100 ;
    Serial.println("l'humidité est de:");
    Serial.println(hum);
    //minimum humidité
    if (hum < min2){
      min2 = hum;
    }
    //maximum humidité
    if (hum > max2){
      max2 = hum;
    }
    //accumulation des valeurs pour le calcul de la moyenne des valeurs d'humidité en fin de boucle
    nbr_valeurs2 += 1;
    somme_valeurs2 += hum;
    delay(2000);
  }  
  Serial.println("la temperature minimum est de :");
  Serial.println(min1);
  Serial.println("la temperature maximum est de :");
  Serial.println(max1);
  Serial.println("l'humidité minimum est de :");
  Serial.println(min2);
  Serial.println("l'humidité maximum est de :");
  Serial.println(max2);
  
  //Calcul des moyennes à la fin de la journée
  moytotale1 = somme_valeurs1 / nbr_valeurs1;
  Serial.println("la temperature moyenne est de:");
  Serial.println(moytotale1);
  moytotale2 = somme_valeurs2 / nbr_valeurs2;
  Serial.println("l'humidité moyenne est de:");
  Serial.println(moytotale2);
}

there is a closing brace preceding that line.

the compiler is expecting a function definition and return type

Thanks for your response. Well I've changed it and it still the same problem, I don't think it came from there..

#include <SoftwareSerial.h>

#include <SoftwareSerial.h>
#define PIN_TX 10  
#define PIN_RX 11

//initialisation des valeurs recupérées toutes les 5MIN
const int capteur = A9 ;
int valeur = 0 ;
float temp;
const int capteur2 = A13 ;
int valeur2 = 0;
float hum;

//initialisation des min max moy 1=temperature
float min1;
float max1;



//initialisation des min max moy 2=humidité
float min2;
float max2;



SoftwareSerial mySerial(PIN_TX,PIN_RX);

void setup() {
  // put your setup code here, to run once:
  mySerial.begin(9600);
  Serial.begin(9600);
  delay(1000); 
  //initialisation de premiere valeur du minimum et maximum temperature
  valeur = analogRead(capteur);
  temp = valeur * 5.0 /100;
  min1 = temp;
  max1 = temp;

  //initialisation de premiere valeur du minimum et maximum humidité
  valeur2 = analogRead(capteur2);
  hum = valeur2 * 50/ 5.38 /100;
  min2 = hum;
  max2 = hum;
}
void loop() {
  // put your main code here, to run repeatedly:
 
  //delay(30000); //5min
    //TEMPERATURE
    valeur = analogRead(capteur);
    // conversion temp de la valeur lue en degres
    temp = valeur * 5.0 /100;
    Serial.println("la temperature est de:");
    Serial.println(temp);
    //minimum temperature
    if (temp < min1){
      min1 = temp;
    }
    //maximum temperature
    if (temp > max1){
      max1 = temp;
    }
    //accumulation des valeurs pour le calcul de la moyenne des valeurs de temperature en fin de boucle
    float somme_valeurs1 = 0.0;
    int nbr_valeurs1 = 0 ;
    nbr_valeurs1 += 1;
    somme_valeurs1 += temp;
    
    //HUMIDITE
     valeur2 = analogRead(capteur2);
    // conversion humidité valeur en pourcentage
    hum = valeur2 * 50/ 5.38 /100 ;
    Serial.println("l'humidité est de:");
    Serial.println(hum);
    //minimum humidité
    if (hum < min2){
      min2 = hum;
    }
    //maximum humidité
    if (hum > max2){
      max2 = hum;
    }
    
    //accumulation des valeurs pour le calcul de la moyenne des valeurs d'humidité en fin de boucle
    float somme_valeurs2 = 0.0;
    int nbr_valeurs2 = 0 ;
    nbr_valeurs2 += 1;
    somme_valeurs2 += hum;
    delay(2000);
  }  
  Serial.println("la temperature minimum est de :");
  Serial.println(min1);
  Serial.println("la temperature maximum est de :");
  Serial.println(max1);
  Serial.println("l'humidité minimum est de :");
  Serial.println(min2);
  Serial.println("l'humidité maximum est de :");
  Serial.println(max2);
  
  //Calcul des moyennes à la fin de la journée*
  float moytotale1;
  moytotale1 = somme_valeurs1 / nbr_valeurs1;
  Serial.println("la temperature moyenne est de:");
  Serial.println(moytotale1);
  float moytotale2;
  moytotale2 = somme_valeurs2 / nbr_valeurs2;
  Serial.println("l'humidité moyenne est de:");
  Serial.println(moytotale2);

Post the COMPLETE error message. Copy / paste it verbatim. Don't give us your interpretation of it.

sketch_jul08a:92:3: error: 'Serial' does not name a type
   Serial.println("la temperature minimum est de :");
   ^~~~~~
sketch_jul08a:93:3: error: 'Serial' does not name a type
   Serial.println(min1);
   ^~~~~~
sketch_jul08a:94:3: error: 'Serial' does not name a type
   Serial.println("la temperature maximum est de :");
   ^~~~~~
sketch_jul08a:95:3: error: 'Serial' does not name a type
   Serial.println(max1);
   ^~~~~~
sketch_jul08a:96:3: error: 'Serial' does not name a type
   Serial.println("l'humidité minimum est de :");
   ^~~~~~
sketch_jul08a:97:3: error: 'Serial' does not name a type
   Serial.println(min2);
   ^~~~~~
sketch_jul08a:98:3: error: 'Serial' does not name a type
   Serial.println("l'humidité maximum est de :");
   ^~~~~~
sketch_jul08a:99:3: error: 'Serial' does not name a type
   Serial.println(max2);
   ^~~~~~
sketch_jul08a:103:3: error: 'moytotale1' does not name a type
   moytotale1 = somme_valeurs1 / nbr_valeurs1;
   ^~~~~~~~~~
sketch_jul08a:104:3: error: 'Serial' does not name a type
   Serial.println("la temperature moyenne est de:");
   ^~~~~~
sketch_jul08a:105:3: error: 'Serial' does not name a type
   Serial.println(moytotale1);
   ^~~~~~
sketch_jul08a:107:3: error: 'moytotale2' does not name a type
   moytotale2 = somme_valeurs2 / nbr_valeurs2;
   ^~~~~~~~~~
sketch_jul08a:108:3: error: 'Serial' does not name a type
   Serial.println("l'humidité moyenne est de:");
   ^~~~~~
sketch_jul08a:109:3: error: 'Serial' does not name a type
   Serial.println(moytotale2);
   ^~~~~~
exit status 1
'Serial' does not name a type

further down, same problem (may not be last)

    somme_valeurs2 += hum;
    delay(2000);
}
Serial.println("la temperature minimum est de :");
Serial.println(min1);

yeah thank you, but I don't have any function definition to make anymore, I just want it to print the results.. This is where I don't undersand what I shall do

when do you want to print?

When the loop is over

All code has to be inside a function. Only declarations can be at top-level in the file.

If you used auto-format on the first version you posted you'd have seen where the rogue } was.

do you mean a the end of loop?
id so why not include it at the end of loop()?

So I just have to put the rogue at the end, for it to be included in a function?

yeah
??

owww I must be really tired, just as simple as that.. sorry about that, thank you haha!