Control Flow
If Statement in Go
The if else block controls decision making by checking true/false statements resulting in different executions of code, depending on if the result is true and if the result is false.
There are three parts to the if-else block: if, else if, and else.
Syntax
if booleanExpression {
//do something
} else if someStatement; booleanExpression2 { //statements can precede boolean expressions
//do something
} else {
//do this if none of the above are true
}Notes
booleanExpression(s) are those that result in either a true or false output (also called conditional statements). They are created using comparing operators (==, >, =, <=, !=).
Statements can precede the Boolean expression. This is often used when error checking.
There can also be multiple Boolean expressions. The Boolean expressions are connected through logical operators (&&, ||, !).
Example
if counter++; counter >= 30 { //assuming counter variable is declared as int
fmt.Println("Counter is greater than or equal to 30."); //assuming fmt declared
}
else if counter == 20 {
System.out.print("Counter is at 20.");
counter++;
}
else {
counter++;
}