Evaluate :
`(-1)-(-19)`

Answer

To evaluate the expression `(-1) - (-19)`, we can follow these steps:

### Step 1: Rewrite the expression
The expression can be rewritten as:
\[ -1 - (-19) \]

### Step 2: Remove the parentheses
When we subtract a negative number, it is equivalent to adding its positive counterpart. Therefore, we can rewrite the expression as:
\[ -1 + 19 \]

### Step 3: Perform the addition
Now, we can add the numbers:
\[ -1 + 19 = 18 \]

### Final Answer
Thus, the value of the expression `(-1) - (-19)` is:
\[ \boxed{18} \]

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