Let Us C 5th Edition by Yashwant Kanetkar

By Yashwant Kanetkar

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C) Blank spaces may be inserted between two words to improve the readability of the statement. However, no blank spaces are allowed within a variable, constant or keyword. (d) All statements are entered in small case letters. (e) C has no specific rules for the position at which a statement is to be written. That’s why it is often called a free-form language. (f) Every C statement must end with a ;. Thus ; acts as a statement terminator. Let us now write down our first C program. It would simply calculate simple interest for a set of values representing principle, number of years and rate of interest.

B) Arithmetic instruction − To perform arithmetic operations between constants and variables. (c) Control instruction − To control the sequence of execution of various statements in a C program. Since, the elementary C programs would usually contain only the type declaration and the arithmetic instructions; we would discuss only these two instructions at this stage. The other types of instructions would be discussed in detail in the subsequent chapters. 24 Let Us C Type Declaration Instruction This instruction is used to declare the type of variables being used in the program.

This operator returns the remainder on dividing one integer with another. Thus the expression 10 / 2 yields 5, whereas, 10 % 2 yields 0. Note that the modulus operator (%) cannot be applied on a float. Also note that on using % the sign of the remainder is always same as the sign of the numerator. Thus –5 % 2 yields –1, whereas, 5 % -2 yields 1. (c) An arithmetic instruction is often used for storing character constants in character variables. char a, b, d ; a = 'F' ; b = 'G' ; d = '+' ; When we do this the ASCII values of the characters are stored in the variables.

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