JS ternary operation (ternary operation) method

1. What is ternary arithmetic: (Boolean expression? Value 0:Value 1;)

5>3?alert( 'Big 5'):alert('Big 3');

that is, if(5>3){alert('Big 5')}else{alert('Big 3')};

Note: The difference between ternary operation and if(){}else{} is that ternary operation has a return value

For example:

var max = a>b?a:b;

2. How to write multi-condition trinocular operation:

Example:Determine the four levels of ABCD based on student performance

var result = (sc<0 || sc>100) ?("Invalid score"):

sc>=90?("A"):

sc>=80?("B"):  

sc>=60?("C"):(" D");

Note: Priority issues need to be considered when calculating, add "()' to avoid incorrect results!

##3. 3. Advantages of ternary operations: concise and clear For reference, I also hope that everyone will support the PHP Chinese website For more articles related to JS ternary operations (ternary operations), please pay attention to the PHP Chinese website