goto

[Kay Schluehr]

Hayri ERDENER schrieb:
> hi,
> what is the equivalent of C languages' goto  statement in python?
> best regards

No, but some of goto's use cases can be covered by unconditional jumps
provided by exceptions.


Here is a C function using goto:

void main()
{
    int i, j;

    for ( i = 0; i < 10; i++ )
    {
        printf( "Outer loop executing. i = %d\n", i );
        for ( j = 0; j < 2; j++ )
        {
            printf( " Inner loop executing. j = %d\n", j );
            if ( i == 3 )
                goto stop;
        }
    }
    /* This message does not print: */
    printf( "Loop exited. i = %d\n", i );
    stop: printf( "Jumped to stop. i = %d\n", i );
}


And here is a Python equivalent using exception handling:

def main():
    class stop(Exception):pass
    try:
        for i in range(10):
            print "Outer loop executing. i = %d"%i
            for j in range(2):
                print " Inner loop executing. j = %d"%j
                if i == 3:
                    raise stop
        print "Loop exited. i = %d"%i  # message does not print
    except stop:
        print "Jumped to stop. i = %d"%i 


Regards,
Kay