Java Control Statements
- Java if Statement
- Java Nested if Statement
- Java if-else-if Statement
- Java Switch Case
- Java Switch with String
- Java Nested Switch
- Java Simple for Loop
- Java for each Loop
- Java Nested for Loops
- Java while loop
- Java continue Statement with for Loop
- Java continue in do-while Loop
- Java break to Exit a for Loop
- Java break with Nested Loops
Java if-else Statement Example demonstrates how to use if-else statement with an example in Java.
Java if-else Statement
The Java if-else statement also tests the condition. It executes the if block if a condition is true otherwise else block, is executed.
Syntax
if(condition){
statement 1; //code if condition is true
}else{
statement 2; //code if condition is false
}
Here, each statement may be a single statement or a compound statement enclosed in curly braces (that is, a block). The condition is an expression that returns a boolean value.
The if works like this: If the condition is true, then statement1 is executed. Otherwise, statement2 (if it exists) is executed.
Java if-else Statement Example
The following program, IfElseDemo, assigns a grade based on the value of a test score: an A for a score of 90% or above, a B for a score of 80% or above, and so on.
package net.javaguides.corejava.controlstatements.ifelse;
public class IfElseDemo {
public static void main(String[] args) {
int testscore = 76;
char grade;
if (testscore >= 90) {
grade = 'A';
} else if (testscore >= 80) {
grade = 'B';
} else if (testscore >= 70) {
grade = 'C';
} else if (testscore >= 60) {
grade = 'D';
} else {
grade = 'F';
}
System.out.println("Grade = " + grade);
}
}
Output:
Grade = C
Note that the value of the test score can satisfy more than one expression in the compound statement: 76 >= 70 and 76 >= 60. However, once a condition is satisfied, the appropriate statements are executed (grade = 'C';) and the remaining conditions are not evaluated.
Reference
Control Statements
Java
Java Tutorial
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