if javascript

1If - Else Statements
2if (condition) {
3// what to do if condition is met
4} else {
5// what to do if condition is not met
6}
7

1if (condition) {
2	//what is done
3}

1if (time < 10) {
2  greeting = "Good morning";
3} else if (time < 20) {
4  greeting = "Good day";
5} else {
6  greeting = "Good evening";
7}

1if (condition1) {
2  //  block of code to be executed if condition1 is true
3 }
4else if (condition2) {
5  //  block of code to be executed if the condition1 is false and 
6  //  condition2 is true
7} else {
8  //  block of code to be executed if the condition1 is false and 
9  //  condition2 is false
10 }

1if (expression) {
2   Statement(s) to be executed if expression is true
3} else {
4   Statement(s) to be executed if expression is false
5}
6

1  if (a > 0) {
2    result = 'positive';
3  } else {
4    result = 'NOT positive';
5  }