why can't my program convert a list of integars to text (string)?

Question

I want to convert a list of integars (after picking up the prime numbers) to text,one str (not a list of strings). How it can be acheived in a effective way as when i run the program it displays nothing not even 'error' Btw the program is supposed to display: "11-19"

this is my code:

v=[11,18,19]
n=3
def premier(v):   
        I=2
        valid=True
        while valid==True and  ( I<=(v/2) ) :
            if (v%I !=0) :
                I +=1              
            else:
                valide=False                
        return(valid)
def chaine(v,n):
    ch=""
    for i in range(n):
        if premier(v[i]):
            ch=ch+str(v[i])+"-"
    ch=ch[:len(ch)-1]
    return(ch)
print(chaine(v,n))

Answer 1

You have a typo in the first else statement of the function premier , which causes an infinite loop.

v=[11,18,19]
n=3
def premier(v):
        I=2
        valid=True
        while valid==True and  ( I<=(v/2) ) :
            if (v%I !=0) :
                I +=1
            else:
                valid=False
        return(valid)

def chaine(v,n):
    ch=""
    for i in range(n):
        if premier(v[i]):
            ch=ch+str(v[i])+"-"
    ch=ch[:len(ch)-1]
    return(ch)
print(chaine(v,n))

With this minor change, your code should work fine. Let me know if this works for you.