Sample > Prédefine function

Create an expression using a predefined function

• abs(x)
• acos(x)
• asin(x)
• atan(x)
• ceil(x)
• cos(x)
• cosh(x)
• exp(x)
• floor(x)
• log(x)
• random()
• sin(x)
• sinh(x)
• sqrt(x)
• tan(x)

My first function expression with expression4j

public static void main(String[] args) {
	try {
		Expression expression = ExpressionFactory
			.createExpression("f()=abs(-3)");
		System.out.println("Expression name: " + expression.getName());
		System.out.println("Value of expression:" + 
			expression.evaluate(null).getRealValue());
	}
	catch (Exception e) {
		System.out.println("Error: " + e);
	}
}