How to represent scientific notation in C

c opencl scientific-computing scientific-notation
user1876508 picture user1876508 · Jun 3, 2013 · Viewed 48.4k times · Source

How do I represent extremely large or small numbers in C with a certain amount of significant figures. For example, if I want to do calculations on 1.54334E-34, how could I do this. Also, is this applicable to OpenCL code?

Answer

mf_ picture mf_ · Jun 3, 2013 
float var = 1.54334E-34;
double var2 = 1.54334E-34;

printf("\n normal:%f\n sci:%e \n or \n sci:%E   \n",var,var,var);
printf("\n normal:%f\n sci:%e \n or \n sci:%E   \n",var2,var2* 1.0E3 ,var2 * 1.0e3);

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