[Solved] What exactly does ‘void’ do?

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void is a return type of the method. A void method can modify the value without returning it.

float temp ;
/*Here you are just setting up the value
 * the method is not returning anything so
 * it should be called like this obj.setTemperature(20.0);
 */
void setTemperature(float newTemp) 
{ 
   temp = newTemp; 
}

/*Here you are retrieving the value thats why
 * While calling you should store the result
 * in a variable like this: float num= obj.getTemperature();
 */
float getTemperature() 
{ 
   return temp;
}

solved What exactly does ‘void’ do?