## finding the power of a number

on 22 Jun 2013

### Azzi Abdelmalek (view profile)

hello, actually what i wanted to know is: if i have a number like 0.6543e+013. Now i just need 0.6543.so i need to divide by 10^the power.but i cant understand how to find this value of power.Is there any function available in matlab that can give me my value...?

Thank you, Ekta

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### Azzi Abdelmalek (view profile)

on 22 Jun 2013
Edited by Azzi Abdelmalek

### Azzi Abdelmalek (view profile)

on 22 Jun 2013

```a=0.6543e+013
power=ceil(log10(a)-1)
b=10^(log10(a)-power)
```

% the result b is always between 1 and 10, if you want the result to be between 0 and 1 add

```power=power+1
b=b/10
```

Ekta Shah

### Ekta Shah (view profile)

on 23 Jun 2013

Thanks a lot.My problem is sorted.

### Andrei Bobrov (view profile)

on 22 Jun 2013

```x = 0.6543e+013
```
```x*10^-ceil(log10(x))
```

### Jan Simon (view profile)

on 23 Jun 2013

What is the wanted result for:

```123.456
0.0000000000123
```

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