Answer: str[0].toUpperCase();
Explanation:
str[0] is pointing to the first character of the entire string and the code str[0].toUpperCase() will convert the characters to upper case if they are in lowercase and will remain unchanged if they are already in upper case.
The size of the array shoeSize? double [] shoeSize = {8.5, 7, 12.5, 9.5, 9, 11.5, 6} is 6
Explanation:
- Arrays are zero-based : the seven elements of a 7-element array are numbered from 0 to 6. Hence, the size of the array is 6.
- An array is collection of items stored at memory locations. The main aim of an array is to store multiple items of same type together.
- An array is a collection of one or more values of the same type. Each value is called an element of the array.
- The location of an item in an array is known as array indexing.
- The first array index is 0 or 1 and indexes continue through the natural numbers.
- The upper bound of an array is generally language and possibly system specific.
- An array type is a data type that represents a collection of elements each selected by one or more identifying keys that can be computed at run time during program execution.
The complete program is to define a boolean method that returns true if all elements of an array are negative, or return false, if otherwise
The method in java, where comments are used to explain each line is as follows:
//This defines the method
public static boolean chkNegative (double[] myArr) {
//This initializes a boolean variable
boolean isNeg = true;
//This iterates through the array
for (int i = 0; i < myArr.length; i++) {
//If the array element is 0 or positive
if (myArr[i] >= 0) {
//Then the boolean variable is set to false
isNeg = false;
//And the loop is exited
break;
}
}
//This returns true or false
return isNeg;
}
Read more about boolean methods at:
brainly.com/question/18318709
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