# How to convert a float array to an integer array in python ?

Published: March 22, 2019

Examples of how to convert a float array to an integer array in python:

### Using the numpy function astype

To convert a float array to an integer array in python, a solution is to use astype, example:

````>>> import numpy as np`
`>>> A = np.array((0.4, 1.6, 2.1, -3.7, 2.9))`
`>>> A`
`array([ 0.4,  1.6,  2.1, -3.7,  2.9])`
`>>> A = A.astype(int)`
`>>> A`
`array([ 0,  1,  2, -3,  2])`
```

### Round the numbers before converting them in integer

It is also possible to round the numbers and after convert them to integer using the numpy function around

````>>> import numpy as np`
`>>> A = np.array((0.4, 1.6, 2.1, -3.7, 2.9))`
`>>> A`
`array([ 0.4,  1.6,  2.1, -3.7,  2.9])`
`>>> A = np.around(A)`
`>>> A`
`array([ 0.,  2.,  2., -4.,  3.])`
`>>> A = A.astype(int)`
`>>> A`
`array([ 0,  2,  2, -4,  3])`
```

Note: work also with the function rint, example

````>>> import numpy as np`
`>>> A = np.array((0.4, 1.6, 2.1, -3.7, 2.9))`
`>>> A`
`array([ 0.4,  1.6,  2.1, -3.7,  2.9])`
`>>> A = np.rint(A)`
`>>> A`
`array([ 0.,  2.,  2., -4.,  3.])`
`>>> A = A.astype(int)`
`>>> A`
`array([ 0,  2,  2, -4,  3])`
```

### Truncate the numbers first

````>>> import numpy as np`
`>>> A = np.array((0.4, 1.6, 2.1, -3.7, 2.9))`
`>>> A`
`array([ 0.4,  1.6,  2.1, -3.7,  2.9])`
`>>> A = np.trunc(A)`
`>>> A`
`array([ 0.,  1.,  2., -3.,  2.])`
`>>> A = A.astype(int)`
`>>> A`
`array([ 0,  1,  2, -3,  2])`
```

### Round to the nearest bigger integer

````>>> import numpy as np`
`>>> A = np.array((0.4, 1.6, 2.1, -3.7, 2.9))`
`>>> A`
`array([ 0.4,  1.6,  2.1, -3.7,  2.9])`
`>>> A = np.ceil(A)`
`>>> A`
`array([ 1.,  2.,  3., -3.,  3.])`
`>>> A = A.astype(int)`
`>>> A`
`array([ 1,  2,  3, -3,  3])`
```

### Round to the nearest smaller integer

````>>> import numpy as np`
`>>> A = np.array((0.4, 1.6, 2.1, -3.7, 2.9))`
`>>> A`
`array([ 0.4,  1.6,  2.1, -3.7,  2.9])`
`>>> A = np.floor(A)`
`>>> A`
`array([ 0.,  1.,  2., -4.,  2.])`
`>>> A = A.astype(int)`
`>>> A`
`array([ 0,  1,  2, -4,  2])`
```