Contenido del Curso
Introduction to JavaScript (staging)
Introduction to JavaScript (staging)
Var 3/3
Why var is not used now
Due to hoisting and the global scope declaring variables with the var leads to so much confusion in the code. If we change the value of a variable at just one place intentionally the var will change that value all over the code. It will create so many unexpected results in our code.
Tarea
Hoisting is used in the following code and this code does not give any error but not a preferable approach. Your task is, using only the let keyword, to re-arrange the variables in the code and display all the variables.
Summary:
- The
varis an alternative to theletkeyword in JavaScript. - Variables declared with
varcan be accessed before the declaration. - The
letandconstdo not allow hoisting butvardoes. - It is not a good practice to use
varinstead we should use let.
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
Var 3/3
Why var is not used now
Due to hoisting and the global scope declaring variables with the var leads to so much confusion in the code. If we change the value of a variable at just one place intentionally the var will change that value all over the code. It will create so many unexpected results in our code.
Tarea
Hoisting is used in the following code and this code does not give any error but not a preferable approach. Your task is, using only the let keyword, to re-arrange the variables in the code and display all the variables.
Summary:
- The
varis an alternative to theletkeyword in JavaScript. - Variables declared with
varcan be accessed before the declaration. - The
letandconstdo not allow hoisting butvardoes. - It is not a good practice to use
varinstead we should use let.
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
Var 3/3
Why var is not used now
Due to hoisting and the global scope declaring variables with the var leads to so much confusion in the code. If we change the value of a variable at just one place intentionally the var will change that value all over the code. It will create so many unexpected results in our code.
Tarea
Hoisting is used in the following code and this code does not give any error but not a preferable approach. Your task is, using only the let keyword, to re-arrange the variables in the code and display all the variables.
Summary:
- The
varis an alternative to theletkeyword in JavaScript. - Variables declared with
varcan be accessed before the declaration. - The
letandconstdo not allow hoisting butvardoes. - It is not a good practice to use
varinstead we should use let.
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones¡Gracias por tus comentarios!
Why var is not used now
Due to hoisting and the global scope declaring variables with the var leads to so much confusion in the code. If we change the value of a variable at just one place intentionally the var will change that value all over the code. It will create so many unexpected results in our code.
Tarea
Hoisting is used in the following code and this code does not give any error but not a preferable approach. Your task is, using only the let keyword, to re-arrange the variables in the code and display all the variables.
Summary:
- The
varis an alternative to theletkeyword in JavaScript. - Variables declared with
varcan be accessed before the declaration. - The
letandconstdo not allow hoisting butvardoes. - It is not a good practice to use
varinstead we should use let.
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opcionesCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones