in selenium I just creating web element list to learn that, in cypress I use .each() method to iterate in same-named elements but Some times I just need to know the same-named elements number to use this number somewhere else.
How can I do that in cypress?
You can store the length of the yielded list of elements via an alias.
cy.get('foo')
.its('length')
.as('listLength');
... // later
cy.get('@listLength').should('be.gte', 1);
If you need to access the variable value synchronously, you could store it in a Cypress environment variable, or a regular JS variable.
let lengthVar;
cy.get('foo')
.its('length')
.then((length) => {
// If storing in a Cypress.env() variable
Cypress.env('listLength', length);
// If storing in a traditional JS variable
lengthVar = length;
});