JavaScript Notes
Ways to define a variable
1// Using var
2var var1 = true;
3
4// Using const
5const var1 = true;
6
7// Using let
8let var1 = true;The ‘Not’ Operator
1var sense = true;
2
3var nonsense = !sense;
4
5var notNonsense = !nonsense;
6console.log('Not Nonsense:', notNonsense);Output:
"Not Nonsense:" trueNumbers
One number type in JS - Number (can be pos, neg, floating point etc)
three symbolic values - +Infinity, -Infinity, and NaN (Not a Number)