# Rndseed or rndcon?

1

Suppose,

```rndseed 34567;
xx = rndn(50,1);

for i (1,100,1);
yy = rndn(50,1);
j = 1;
do while j <= 1000;
zz = rndn(50,1);
j = j + 1;
endo;
endfor;```

I want "xx" stay the same whenever I run the program. But "yy" and "zz" have to be different. The used of "rndseed" makes all the three have similar values.

0

In GAUSS 12 and newer versions rndn has an optional input of a state or seed, so your could change your program easily to this:

```seed = 34567;
{ xx, state } = rndn(50,1, seed);

for i (1,100,1);
yy = rndn(50,1);
j = 1;
do while j ≤ 1000;
zz = rndn(50,1);
j = j + 1;
endo;
endfor;```

In older versions of GAUSS you can use the rndLCn function instead of adding the seed input to rndn (which will still work in the current version as well) .

0

In GAUSS 12 and newer versions rndn has an optional input of a state or seed, so your could change your program easily to this:

```seed = 34567;
{ xx, state } = rndn(50,1, seed);

for i (1,100,1);
yy = rndn(50,1);
j = 1;
do while j ≤ 1000;
zz = rndn(50,1);
j = j + 1;
endo;
endfor;```

In older versions of GAUSS you can use the rndLCn function instead of adding the seed input to rndn (which will still work in the current version as well) .

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