A simple Java loop does not work as intended

Question

In Java, each number is associated with a character. For example:

int ch = 65;
System.out.print((char)(ch)); // output: A

Similarly,

System.out.print((char)(66)); // output: B

and so on

This is my code:

for (int line = 1; line <= 4; line++) {
    for (int ch = 65; ch <= line; ch++) {
        System.out.print((char)(ch));
    }
    System.out.println();
}

I was expecting this output:

A
BC
DEF
GHIJ

Instead, I got:

(yup, nothing!)

What am I doing wrong?

Answer 1

Actually your condition ch <= line is always false.

To fix it and get the expected result you can change the conditions and the loop limits:

int startingChar = 65;
for (int line = 0; line < 4; line++) {
    int ch;
    for (ch = startingChar ; ch <= startingChar + line; ch++) {
        System.out.print((char)(ch));
    }
    startingChar = ch;
    System.out.println();
}