C tutorial- basic

C TUTORIALS-00

INTRO TO C PROGRAMMING LANGUAGE

C PROGRAMMING LANGUAGE WAS INVENTED BY 'DENNIS RITCHIE'.

TODAY WE WILL DISCUSS MANY THINGS ABOUT  BASICS OF C PROGRAMMING LANGUAGE.

SO LET'S GET STARTED !

TOPICS COVERED  IN THIS SECTION-

1. BASICS INTRO TO ELEMENTS OF C

2.OPERATORS

3. CONDITIONAL STATEMENTS

4. LOOPS

1.ELEMENTS OF C 

A C program basically consists of the following parts −

• Preprocessor Commands- HEADER FILES CONTAINS PRE PROGRAMMED FUNCTION
• Functions - PROGRAM STARTS FROM MAIN FUNCTIONS UNDER WHICH OTHER USER DEFINED FUNCTIONS CAN BE USED
• Variables-  ANYTHING WHICH CAN BE  CHANGED IN ENTIRE PROGRAMS , VALUE IS NOT FIXED
• Statements & Expressions
• Comments
• 
  

2. operators

• Arithmetic Operators
• Relational Operators
• Logical Operators
• Bitwise Operators
• Assignment Operators
• Misc Operators

• && (logical AND)	(x>5)&&(y<5) It returns true when both conditions are true
  || (logical OR)	(x>=10)||(y>=10) It returns true when at-least one of the condition is true
  ! (logical NOT)	!((x>5)&&(y<5)) It reverses the state of the operand “((x>5) && (y<5))” If “((x>5) && (y<5))” is true, logical NOT operator makes it false

• BELOW ARE THE BIT-WISE OPERATORS AND THEIR NAME IN C LANGUAGE.

  1. & – Bitwise AND
  2. | – Bitwise OR
  3. ~ – Bitwise NOT
  4. ^ – XOR
  5. << – Left Shift
  6. >> – Right Shift

3. conditional statements

Exp1 ? Exp2 : Exp3;

Where Exp1, Exp2, and Exp3 are expressions. Notice the use and placement of the colon.

The value of a ? expression is determined like this −

• Exp1 is evaluated. If it is true, then Exp2 is evaluated and becomes the value of the entire ? expression.
• If Exp1 is false, then Exp3 is evaluated and its value becomes the value of the expression.

4. loops

Loop Name	Syntax
for	for (exp1; exp2; expr3) { statements; } Where, exp1 – variable initialization ( Example: i=0, j=2, k=3 ) exp2 – condition checking ( Example: i>5, j<3, k=3 ) exp3 – increment/decrement ( Example: ++i, j–, ++k )
while	while (condition) { statements; } where,  condition might be a>5, i<10
do while	do { statements; } while (condition); where, condition might be a>5, i<10

1	break statement Terminates the loop or switch statement and transfers execution to the statement immediately following the loop or switch.
2	continue statement Causes the loop to skip the remainder of its body and immediately retest its condition prior to reiterating.
3	goto statement Transfers control to the labeled statement.

SOME BASIC PROGRAMS FOR START

. 

 2. sum of natural nos

3.prime or not

 

3. bitwise 'and'

 NEXT TOPICS---- ARRAYS, STRING AND POINTERS

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