Write the IUPAC name of `CH_3-CH_2-CH_2-CH=CH_2`

Explanation

To determine the IUPAC name of the compound `CH3-CH2-CH2-CH=CH2`, we can follow these steps:

### Step 1: Identify the longest carbon chain
The given structure is `CH3-CH2-CH2-CH=CH2`. We need to identify the longest continuous carbon chain. In this case, the longest chain consists of 5 carbon atoms.

### Step 2: Number the carbon chain
We will number the carbon chain starting from the end closest to the double bond. This helps in assigning the lowest possible number to the double bond. The numbering will be as follows:
1. CH2= (C1)
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