In the console window, you will see two very different results. Simply put, in the first line, the variable a is the variable a, the variable b is the variable b, and the variable val is the variable val.
In the second line, the variablea is the variable a, the variable b is the variable b, and the variable refVal is the variable b. This is the whole crux of the ref keyword. In the first GetLargest() method, we returned the largest value into the variable val. This value was 20. The variable val and the variable b had no relation to one another as they were allocated different spaces in memory.
In the second GetLargest() method, we returned the largest variable itself (which was b) into the variable refVal. The variable
