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.
Swipe to start coding
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.
Solução
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.
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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.
Swipe to start coding
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.
Solução
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.
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