How can i start ignoring an if conditional once the condition is met? - performance

Question

#include <cs50.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
bool valid(string password);
int main(void)
{
string password = get_string("Enter your password: ");
if (valid(password))
{
printf("Your password is valid!\n");
}
else
{
printf("Your password needs at least one uppercase letter, lowercase letter, number and symbol\n");
}
}
// TODO: Complete the Boolean function below
bool valid(string password)
{
bool CheckUpper = false;
bool CheckLower = false;
bool CheckNumber = false;
bool CheckSymbol = false;
for ( int i=0; i < strlen(password); i++)
{
if (islower (password[i]))
{
CheckLower = true;
}
if (isupper (password[i]))
{
CheckUpper = true;
}
if (isdigit (password[i]))
{
CheckNumber = true;
}
if (!isalnum(password[i]))
{
CheckSymbol = true;
}
}
if (CheckLower == true && CheckUpper == true && CheckNumber == true && CheckSymbol == true)
{
return true;
}
return false;
}
So this code will ask you for a password, and the "valid" Boolean type function will determine whether it is a valid password or not. As you can see it is using an if conditional for every condition required, for each letter of the password in a for loop.
Imagine the first letter is lower case. Is there a way to "skip the if" conditional that checks for a lower case for the next letters/digits of the password? And this way being faster.
I've tried using the continue statement but soon realized it made no sense as it was going back to that if conditional when tenter code herehe for loop advanced one position.