javascript，意外令牌{

Question

Okay, I have a very basic syntax error that I'm having issues resolving. Apparently I missed something very basic and important on the code academy class I can't seem to resolve. I'll post the code below. It should be obvious what I'm trying to do within.

The error = "Syntax Error: Unexpected token {"

The goal, write my own code incorporating for loops, if/else, and functions.

var data = ["love", "peace", "anger", "war"]

for (i = 0; i < data.length; i++){
  if (i <=2){
    console.log("life is" + " " +data[i]);
  }
  else if (i <=4){
    console.log("Strife is" + " " + data[i]);
  }
  else (i = 5){
    console.log("That's all for now");
  }
}

Answer 1

The problem, as pointed out, is that else does not take a condition which makes sense as the else body is run when all the other corresponding if/else-if conditionals failed.

Thus JavaScript (not requiring braces around if/else-bodies) is parsing it as so:

else Statement

More specifically it starts parsing it as an ExpressionStatement , (i = 5) , followed by an invalid { . It is invalid for the same reason the following is invalid:

i = 5 { }

Statements must be separated by semicolons - explicitly or via automatic semicolon insertion . The former is not done and the latter does not apply in the given code.