Answer:
Here is code in java.
import java.util.*;
class Main
{
// main method of the class
public static void main (String[] args) throws java.lang.Exception
{
try{
// scanner object to read input from user
Scanner obj=new Scanner(System.in);
System.out.println("please enter a string:");
//read the string input
String inp=obj.next();
// call the function to check whether string has vowel or not
Boolean res=has_a_vowel(inp);
// printing the result
System.out.println("string contains vowel."+res);
}catch(Exception ex){
return;}
}
// method to check string has vowel or not
public static boolean has_a_vowel(String str)
{
// find length of the string
int len=str.length();
Boolean flag=false;
int i;
for( i=0;i<len;i++)
{
char chh=str.charAt(i);
// if string contains vowel then flag will be true
if(chh=='a'||chh=='e'||chh=='i'||chh=='o'||chh=='u')
{
flag=true;
break;
}
}
//returning the result
return flag;
}
}
Explanation:
Create a scanner class object to read the string and assign it to variable
"inp".Call the function "has_a_vowel" with a string parameter.In this function
find the length of string and travers the string.If there is any vowel character
in the string then flag will be set to true otherwise flag will be false. Then it will
return the value of flag.We can test the function from the main by passing a string parameter.
Output:
please enter a string:
vjcavcavacvajjfd
string contains vowel:true
please enter a string:
sdfdhgjkhltyrqwzxcvbmm
string contains vowel: false
