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# Generate random numbers with rand() except number zero

By : user2955076
Date : November 22 2020, 10:38 AM
To fix the issue you can do I would like to generate random numbers between 1 and 25 with the method rand(). , Very simple
code :
``````int r = 1 + rand() % 25 /* random int between 1 and 25 */
``````
``````int r = (int)(1.0 + 25.0 * rand() / RAND_MAX)
``````

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## using rand to generate a random numbers

By : Cory Sammons
Date : March 29 2020, 07:55 AM
seems to work fine You're seeding inside the loop (with the same value because of how quickly the loop will be executed), which causes the random number generated to be the same each time.
You need to move your seed function outside the loop:
code :
``````/* Initialize random number */
srand((unsigned int)time(NULL));

for(i = 0; i < 3; i++) {
/* Added random number (simulate seconds) */
}
``````

## How can C/C++'s rand() generate random numbers so quickly?

By : Tim Mueller
Date : March 29 2020, 07:55 AM
I wish this helpful for you rand() uses the previous random value as the new seed on subsequent calls. This is why a unique random sequence of values will be generated when you start with a different seed value.

## Why does the rand.Intn() function from math/rand package generate the same sequence of random numbers everytime I run th

By : Rob Napier
Date : March 29 2020, 07:55 AM
I hope this helps you . From documentation
code :
``````rand.Seed(time.Now().UTC().UnixNano())
``````

## Use the Rand() function to Generate random numbers except numbers in Array

By : knowit
Date : March 29 2020, 07:55 AM
hop of those help? I want to use the rand() function to generate random numbers except numbers in an array or in my database. , Something like this:
code :
``````\$not = [1, 4, 9];
\$min = 1;
\$max = 10;

do {
\$random = random_int(\$min, \$max);
} while(in_array(\$random, \$not));
var_dump(\$random);
``````

## How can i generate random numbers with rand()?

By : user3549225
Date : March 29 2020, 07:55 AM
will be helpful for those in need If you want numbers from 1000 to 9999, that means you want values from a range of 9000 numbers. So that value needs to be your modulus, not 9999.
code :
``````mi = rand() % 9000 + 1000;
``````