Description
The purpose of this challenge is to various flow looping and control structures. This challenge displays a menu and asks the user to perform various tasks.
Requirements
int term1 = 1; int term2 = 1; int next = term1 + term2; while (some boolean expression) { // set new values for term1, term2 and next according // to Fibonacci }
Sample Interaction / Output
a - Display all odd b - Is number in Fibonacci? c - Sum of numbers between 1 and 10 q - Quit Enter a command: f <Unknown command> Enter a command: a Enter a number: 1 Enter a number: 10 ALL ODD: 1 3 5 7 9 Enter a command: b Enter a number: 5 5 is in the Fibonacci sequence Enter a command: b Enter a number: 11 11 is not in the Fibonacci sequence Enter a command: c Enter a number: 1 Enter a number: 10 SUM: 55 Enter a command: q
Source code
import java.io.*;
import java.util.*;
class StructuresExample {
public static void main (String[] args) {
Scanner sc=new Scanner(System.in);
while(true){
System.out.println("a-display all odd");
System.out.println("b-is number in fibonacci");
System.out.println("c-sum of numbers between n1 and n2");
System.out.println("d-quit");
System.out.println("enter your command");
String ch=sc.nextLine();
System.out.print(ch);
if(ch.equals("a")){
System.out.println("enter two numbers");
int a=sc.nextInt() ;
int b=sc.nextInt() ;
int i;
if(a%2==0)
i=a+1;
else
i=a;
System.out.print("All odd: ");
for(i=i;i<=b;i=i+2){
System.out.print(i+" ");
}
}
else if(ch.equals("b")) {
System.out.println("enter a number");
int it=sc.nextInt() ;
int a=1;
int b=1;
int next=a+b;
for(;next<it;){
a=b;
b=next;
next=a+b;
if(next==it){
System.out.println(it+" is in the fibonacci series");
}
if(next>it){
System.out.println(it+" is not in the fibonacci series");
}
}
}
else if(ch.equals("c")) {
System.out.println("enter two numbers");
int a=sc.nextInt() ;
int b=sc.nextInt() ;
int sum=0;
for(int I=a;I<=b;I++){
sum=sum+I;
}
System.out.println("SUM:"+sum);
}
else if(ch.equals("d")){
System.exit(0) ;
}
else{
System.out.println("<unknown command>");
}
}
}
}
Input:
a
1
10
b
8
c
1
10
F
d
Output:
a-display all odd
b-is number in fibonacci
c-sum of numbers between n1 and n2
d-quit
enter your command a
enter two numbers 1 10
All odd: 1 3 5 7 9
a-display all odd
b-is number in fibonacci
c-sum of numbers between n1 and n2
d-quit
enter your command F
<unknown command>
a-display all odd
b-is number in fibonacci
c-sum of numbers between n1 and n2
d-quit
enter your command
benter a number 8
8 is in the fibonacci series
a-display all odd
b-is number in fibonacci
c-sum of numbers between n1 and n2
d-quit
enter your command
c enter two numbers 1 10
SUM:55
a-display all odd
b-is number in fibonacci
c-sum of numbers between n1 and n2
d-quit
enter your command
d
Description The purpose of this challenge is to various flow looping and control structures. This challenge...
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