# How to fix limit in double and floating numbers after dot in c++

## How to fix limit in double and floating numbers after dot in c++:-

Here in this article we will learn How to fix limit in double and floating numbers after dot (.) in c++ that means how to fix the no. of numbers in the double and floating point numbers (i.e 235.2356 after dot how many numbers there will be ) . For this we can use precision() . In this method we can write **cout.precision(x)** where value of x determine how many number there will me after dot (.) .

__Method 1:-__

#include <iostream> #include <cstdio> using namespace std; int main() { double a=123.4589; double b=1.0e6; double c=1256.32; printf("%.2lf %.2lf %.2lf",a,b,c); return 0; }

__output:-__123.46 1000000.00 1256.32

__Method 2 (How to fix limit in double and floating numbers after dot in c++ ):-__

In this method we will use precision function which is predefine in iostream library file .

by using this we can simply set a limit a after dot in the floating and double numbers.

#include <iostream> #include <cstdio> using namespace std; int main() { double a=123.4589; double b=1.0e6; double c=1256.32; cout.precision(2); // In fixed notation cout<<"In fixed notation"<<endl; cout<<fixed<<a<<" "<<b<<" "<<c<<endl; // In scientific notation cout<<"In Scientific Notation"<<endl; cout<<scientific<<a<<" "<<b<<" "<<c<<endl; return 0; }

__Output:-__

In fixed notation 123.46 1000000.00 1256.32 In Scientific Notation 1.23e+02 1.00e+06 1.26e+03

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